feat(repository): support only/exclude/canonical repo filters

Composer's FilterRepository wraps a repository with three knobs:
`only` / `exclude` to drop packages by name, and `canonical: false` to
relax the repo's authoritative claim on its package names so
lower-priority repos can still answer. Mozart was ignoring all three,
so first-listed inline / composer-repo entries always shadowed later
repos and `only` / `exclude` lists were silently no-ops.

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

2 files changed, 7 insertions, 1 deletions

diff --git a/crates/mozart/src/commands/init.rs b/crates/mozart/src/commands/init.rs
index 49176ab..1a6df37 100644
--- a/crates/mozart/src/commands/init.rs
+++ b/crates/mozart/src/commands/init.rs
@@ -704,6 +704,9 @@ fn parse_repositories(repos: &[String]) -> anyhow::Result<Vec<RawRepository>> {
                 repo_type,
                 url: Some(url),
                 package: None,
+                only: None,
+                exclude: None,
+                canonical: None,
             });
         } else {
             // Plain URL
@@ -711,6 +714,9 @@ fn parse_repositories(repos: &[String]) -> anyhow::Result<Vec<RawRepository>> {
                 repo_type: "vcs".to_string(),
                 url: Some(repo.clone()),
                 package: None,
+                only: None,
+                exclude: None,
+                canonical: None,
             });
         }
     }
diff --git a/crates/mozart/tests/installer.rs b/crates/mozart/tests/installer.rs
index 8564d0c..cd00f88 100644
--- a/crates/mozart/tests/installer.rs
+++ b/crates/mozart/tests/installer.rs
@@ -333,7 +333,7 @@ installer_fixture!(replaced_packages_should_not_be_installed_when_installing_fro
 installer_fixture!(replacer_satisfies_its_own_requirement);
 installer_fixture!(repositories_priorities);
 installer_fixture!(repositories_priorities2);
-installer_fixture!(repositories_priorities3, ignore);
+installer_fixture!(repositories_priorities3);
 installer_fixture!(repositories_priorities4);
 installer_fixture!(repositories_priorities5);
 installer_fixture!(root_alias_change_with_circular_dep, ignore);