feat(crdt): add database migration for crdt_documents table

Add Drizzle migration to create the crdt_documents table with:
- UUID primary key with auto-generation
- Foreign key to users table with cascade delete
- Unique index on (user_id, entity_type, entity_id)
- Indexes for entity_type and sync_version queries

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

6 files changed, 1009 insertions, 3 deletions

diff --git a/docs/dev/roadmap.md b/docs/dev/roadmap.md
index d7366d9..36e17e6 100644
--- a/docs/dev/roadmap.md
+++ b/docs/dev/roadmap.md
@@ -32,7 +32,7 @@ Replace the current Last-Write-Wins (LWW) conflict resolution with Automerge CRD
 
 - [x] Install server dependency: `@automerge/automerge`
 - [x] Create `src/server/db/schema-crdt.ts` - CRDT document storage schema
-- [ ] Create database migration for crdt_documents table
+- [x] Create database migration for crdt_documents table
 - [ ] Modify `src/server/routes/sync.ts` - Handle CRDT changes in API
 - [ ] Modify `src/server/repositories/sync.ts` - Store/merge CRDT documents
 
diff --git a/drizzle/0004_clean_leopardon.sql b/drizzle/0004_clean_leopardon.sql
new file mode 100644
index 0000000..95e203d
--- /dev/null
+++ b/drizzle/0004_clean_leopardon.sql
@@ -0,0 +1,15 @@
+CREATE TABLE "crdt_documents" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"user_id" uuid NOT NULL,
+	"entity_type" varchar(50) NOT NULL,
+	"entity_id" uuid NOT NULL,
+	"binary" varchar(1048576) NOT NULL,
+	"sync_version" integer DEFAULT 0 NOT NULL,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"updated_at" timestamp with time zone DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+ALTER TABLE "crdt_documents" ADD CONSTRAINT "crdt_documents_user_id_users_id_fk" FOREIGN KEY ("user_id") REFERENCES "public"."users"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+CREATE UNIQUE INDEX "crdt_documents_user_entity_idx" ON "crdt_documents" USING btree ("user_id","entity_type","entity_id");--> statement-breakpoint
+CREATE INDEX "crdt_documents_entity_type_idx" ON "crdt_documents" USING btree ("entity_type");--> statement-breakpoint
+CREATE INDEX "crdt_documents_sync_version_idx" ON "crdt_documents" USING btree ("user_id","sync_version");
\ No newline at end of file
diff --git a/drizzle/meta/0004_snapshot.json b/drizzle/meta/0004_snapshot.json
new file mode 100644
index 0000000..e0b6fce
--- /dev/null
+++ b/drizzle/meta/0004_snapshot.json
@@ -0,0 +1,980 @@
+{
+  "id": "4978370b-924e-40b1-9fd4-770994e1a90a",
+  "prevId": "64c4ab9c-4036-44de-99cb-c4b14f494a4d",
+  "version": "7",
+  "dialect": "postgresql",
+  "tables": {
+    "public.cards": {
+      "name": "cards",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "deck_id": {
+          "name": "deck_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "note_id": {
+          "name": "note_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "is_reversed": {
+          "name": "is_reversed",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "front": {
+          "name": "front",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "back": {
+          "name": "back",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "state": {
+          "name": "state",
+          "type": "smallint",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "due": {
+          "name": "due",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "stability": {
+          "name": "stability",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "difficulty": {
+          "name": "difficulty",
+          "type": "real",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "elapsed_days": {
+          "name": "elapsed_days",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "scheduled_days": {
+          "name": "scheduled_days",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "reps": {
+          "name": "reps",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "lapses": {
+          "name": "lapses",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "last_review": {
+          "name": "last_review",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "deleted_at": {
+          "name": "deleted_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "sync_version": {
+          "name": "sync_version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "cards_deck_id_decks_id_fk": {
+          "name": "cards_deck_id_decks_id_fk",
+          "tableFrom": "cards",
+          "tableTo": "decks",
+          "columnsFrom": [
+            "deck_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        },
+        "cards_note_id_notes_id_fk": {
+          "name": "cards_note_id_notes_id_fk",
+          "tableFrom": "cards",
+          "tableTo": "notes",
+          "columnsFrom": [
+            "note_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.decks": {
+      "name": "decks",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "description": {
+          "name": "description",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "new_cards_per_day": {
+          "name": "new_cards_per_day",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 20
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "deleted_at": {
+          "name": "deleted_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "sync_version": {
+          "name": "sync_version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "decks_user_id_users_id_fk": {
+          "name": "decks_user_id_users_id_fk",
+          "tableFrom": "decks",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.note_field_types": {
+      "name": "note_field_types",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "note_type_id": {
+          "name": "note_type_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "order": {
+          "name": "order",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "field_type": {
+          "name": "field_type",
+          "type": "varchar(50)",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'text'"
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "deleted_at": {
+          "name": "deleted_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "sync_version": {
+          "name": "sync_version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "note_field_types_note_type_id_note_types_id_fk": {
+          "name": "note_field_types_note_type_id_note_types_id_fk",
+          "tableFrom": "note_field_types",
+          "tableTo": "note_types",
+          "columnsFrom": [
+            "note_type_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.note_field_values": {
+      "name": "note_field_values",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "note_id": {
+          "name": "note_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "note_field_type_id": {
+          "name": "note_field_type_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "value": {
+          "name": "value",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "sync_version": {
+          "name": "sync_version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "note_field_values_note_id_notes_id_fk": {
+          "name": "note_field_values_note_id_notes_id_fk",
+          "tableFrom": "note_field_values",
+          "tableTo": "notes",
+          "columnsFrom": [
+            "note_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        },
+        "note_field_values_note_field_type_id_note_field_types_id_fk": {
+          "name": "note_field_values_note_field_type_id_note_field_types_id_fk",
+          "tableFrom": "note_field_values",
+          "tableTo": "note_field_types",
+          "columnsFrom": [
+            "note_field_type_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.note_types": {
+      "name": "note_types",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "front_template": {
+          "name": "front_template",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "back_template": {
+          "name": "back_template",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "is_reversible": {
+          "name": "is_reversible",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "deleted_at": {
+          "name": "deleted_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "sync_version": {
+          "name": "sync_version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "note_types_user_id_users_id_fk": {
+          "name": "note_types_user_id_users_id_fk",
+          "tableFrom": "note_types",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.notes": {
+      "name": "notes",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "deck_id": {
+          "name": "deck_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "note_type_id": {
+          "name": "note_type_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "deleted_at": {
+          "name": "deleted_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "sync_version": {
+          "name": "sync_version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "notes_deck_id_decks_id_fk": {
+          "name": "notes_deck_id_decks_id_fk",
+          "tableFrom": "notes",
+          "tableTo": "decks",
+          "columnsFrom": [
+            "deck_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        },
+        "notes_note_type_id_note_types_id_fk": {
+          "name": "notes_note_type_id_note_types_id_fk",
+          "tableFrom": "notes",
+          "tableTo": "note_types",
+          "columnsFrom": [
+            "note_type_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.refresh_tokens": {
+      "name": "refresh_tokens",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "token_hash": {
+          "name": "token_hash",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "refresh_tokens_user_id_users_id_fk": {
+          "name": "refresh_tokens_user_id_users_id_fk",
+          "tableFrom": "refresh_tokens",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.review_logs": {
+      "name": "review_logs",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "card_id": {
+          "name": "card_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "rating": {
+          "name": "rating",
+          "type": "smallint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "state": {
+          "name": "state",
+          "type": "smallint",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "scheduled_days": {
+          "name": "scheduled_days",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "elapsed_days": {
+          "name": "elapsed_days",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "reviewed_at": {
+          "name": "reviewed_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "duration_ms": {
+          "name": "duration_ms",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "sync_version": {
+          "name": "sync_version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "review_logs_card_id_cards_id_fk": {
+          "name": "review_logs_card_id_cards_id_fk",
+          "tableFrom": "review_logs",
+          "tableTo": "cards",
+          "columnsFrom": [
+            "card_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        },
+        "review_logs_user_id_users_id_fk": {
+          "name": "review_logs_user_id_users_id_fk",
+          "tableFrom": "review_logs",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.users": {
+      "name": "users",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "username": {
+          "name": "username",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "password_hash": {
+          "name": "password_hash",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "users_username_unique": {
+          "name": "users_username_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "username"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.crdt_documents": {
+      "name": "crdt_documents",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "uuid",
+          "primaryKey": true,
+          "notNull": true,
+          "default": "gen_random_uuid()"
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "entity_type": {
+          "name": "entity_type",
+          "type": "varchar(50)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "entity_id": {
+          "name": "entity_id",
+          "type": "uuid",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "binary": {
+          "name": "binary",
+          "type": "varchar(1048576)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "sync_version": {
+          "name": "sync_version",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "default": 0
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {
+        "crdt_documents_user_entity_idx": {
+          "name": "crdt_documents_user_entity_idx",
+          "columns": [
+            {
+              "expression": "user_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            },
+            {
+              "expression": "entity_type",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            },
+            {
+              "expression": "entity_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": true,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        },
+        "crdt_documents_entity_type_idx": {
+          "name": "crdt_documents_entity_type_idx",
+          "columns": [
+            {
+              "expression": "entity_type",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        },
+        "crdt_documents_sync_version_idx": {
+          "name": "crdt_documents_sync_version_idx",
+          "columns": [
+            {
+              "expression": "user_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            },
+            {
+              "expression": "sync_version",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {
+        "crdt_documents_user_id_users_id_fk": {
+          "name": "crdt_documents_user_id_users_id_fk",
+          "tableFrom": "crdt_documents",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    }
+  },
+  "enums": {},
+  "schemas": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "views": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}
\ No newline at end of file
diff --git a/drizzle/meta/_journal.json b/drizzle/meta/_journal.json
index cdfca60..fe8279e 100644
--- a/drizzle/meta/_journal.json
+++ b/drizzle/meta/_journal.json
@@ -29,6 +29,13 @@
       "when": 1767156818092,
       "tag": "0003_brave_blacklash",
       "breakpoints": true
+    },
+    {
+      "idx": 4,
+      "version": "7",
+      "when": 1767164715079,
+      "tag": "0004_clean_leopardon",
+      "breakpoints": true
     }
   ]
 }
\ No newline at end of file
diff --git a/src/server/db/schema-crdt.ts b/src/server/db/schema-crdt.ts
index 2567609..c5ed4bc 100644
--- a/src/server/db/schema-crdt.ts
+++ b/src/server/db/schema-crdt.ts
@@ -15,10 +15,11 @@ import {
 	integer,
 	pgTable,
 	timestamp,
+	uniqueIndex,
 	uuid,
 	varchar,
 } from "drizzle-orm/pg-core";
-import { users } from "./schema.js";
+import { users } from "./schema";
 
 /**
  * Valid entity types for CRDT documents
@@ -70,7 +71,7 @@ export const crdtDocuments = pgTable(
 	},
 	(table) => [
 		// Unique constraint on (user_id, entity_type, entity_id)
-		index("crdt_documents_user_entity_idx").on(
+		uniqueIndex("crdt_documents_user_entity_idx").on(
 			table.userId,
 			table.entityType,
 			table.entityId,
diff --git a/src/server/db/schema.ts b/src/server/db/schema.ts
index 0471a92..50caf85 100644
--- a/src/server/db/schema.ts
+++ b/src/server/db/schema.ts
@@ -199,3 +199,6 @@ export const reviewLogs = pgTable("review_logs", {
 	durationMs: integer("duration_ms"),
 	syncVersion: integer("sync_version").notNull().default(0),
 });
+
+// Re-export CRDT schema
+export * from "./schema-crdt";