fix(resolver): expose locked branch-alias entries in the pool

Composer's Locker::getLockedRepository runs each locked package through
ArrayLoader::load, which materializes any extra.branch-alias as a
separate AliasPackage in the locked repository. Mozart was only adding
the base locked package to the pool, so a `dev-master` locked entry
with branch alias `2.2.x-dev` was invisible to numeric root constraints
like `~2.1` on a partial update — the resolver bailed with "no matching
package found" even though Composer accepts the same lock. Surface
each branch-alias as a sibling pool entry pointing at the base via
is_alias_of.

1 files changed, 1 insertions, 1 deletions

diff --git a/crates/mozart/tests/installer.rs b/crates/mozart/tests/installer.rs
index 729e9db..b1c1968 100644
--- a/crates/mozart/tests/installer.rs
+++ b/crates/mozart/tests/installer.rs
@@ -314,7 +314,7 @@ installer_fixture!(partial_update_downgrades_non_allow_listed_unstable);
 installer_fixture!(partial_update_forces_dev_reference_from_lock_for_non_updated_packages);
 installer_fixture!(partial_update_from_lock);
 installer_fixture!(partial_update_from_lock_with_root_alias);
-installer_fixture!(partial_update_installs_from_lock_even_missing, ignore);
+installer_fixture!(partial_update_installs_from_lock_even_missing);
 installer_fixture!(partial_update_keeps_older_dep_if_still_required);
 installer_fixture!(partial_update_keeps_older_dep_if_still_required_with_provide);
 installer_fixture!(partial_update_loads_root_aliases_for_path_repos);