refactor(registry): plumb RepositorySet and executor through callers

ResolveRequest and LockFileGenerationRequest now take Arc<RepositorySet>
instead of a raw Cache. install_from_lock now accepts &mut dyn
InstallerExecutor instead of constructing FilesystemExecutor internally.
Both changes expose the DI injection points needed by the upcoming
in-process test harness, where Packagist must be replaced with an empty
RepositorySet (Composer's `'packagist' => false` test config) and
filesystem install execution must be replaced with a tracing recorder
(Composer's InstallationManagerMock).

The eager VCS scan and inline-package preload still happen inside
resolve(), so the RawRepository array is kept on ResolveRequest as
raw_repositories - migrating those through RepositorySet remains a
follow-up. RepositorySet gains with_packagist and empty constructors so
production callers and future tests have a uniform construction shape.

All 136 enabled installer fixtures + 114 mozart-registry tests + 541
mozart lib tests still green; clippy clean.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

1 files changed, 12 insertions, 3 deletions

diff --git a/crates/mozart/src/commands/create_project.rs b/crates/mozart/src/commands/create_project.rs
index a137868..01b337e 100644
--- a/crates/mozart/src/commands/create_project.rs
+++ b/crates/mozart/src/commands/create_project.rs
@@ -419,9 +419,11 @@ pub async fn execute(
         platform: PlatformConfig::new(),
         ignore_platform_reqs: args.ignore_platform_reqs,
         ignore_platform_req_list: args.ignore_platform_req.clone(),
-        repo_cache: repo_cache.clone(),
+        repositories: std::sync::Arc::new(
+            mozart_registry::repository::RepositorySet::with_packagist(repo_cache.clone()),
+        ),
         temporary_constraints: HashMap::new(),
-        repositories: raw.repositories.clone(),
+        raw_repositories: raw.repositories.clone(),
     };
 
     console.info("Resolving dependencies...");
@@ -440,7 +442,9 @@ pub async fn execute(
         composer_json_content: composer_json_content.clone(),
         composer_json: raw.clone(),
         include_dev: dev_mode,
-        repo_cache: repo_cache.clone(),
+        repositories: std::sync::Arc::new(
+            mozart_registry::repository::RepositorySet::with_packagist(repo_cache.clone()),
+        ),
     })
     .await?;
 
@@ -497,6 +501,10 @@ pub async fn execute(
         .and_then(|v| v.as_bool())
         .unwrap_or(false);
 
+    let cache_config = mozart_registry::cache::build_cache_config(cli.no_cache);
+    let files_cache = mozart_registry::cache::Cache::files(&cache_config);
+    let mut executor =
+        mozart_registry::installer_executor::FilesystemExecutor::new(files_cache);
     super::install::install_from_lock(
         &new_lock,
         &target_dir,
@@ -517,6 +525,7 @@ pub async fn execute(
             no_cache: cli.no_cache,
         },
         console,
+        &mut executor,
     )
     .await?;