Ignore typing error (see note)

RepositoryMetadata is mapped imperatively, so until the mapper creates
attributes based on Column definitions, the attribute does not exist on
the class. This class is mapped imperatively due to the complications
triggered by mapping the "metadata" attribute.

lib/tool_shed/metadata/repository_metadata_manager.py

@@ -1084,7 +1084,7 @@ def get_repository_metadata(session, repository_id):
     stmt = (
         select(RepositoryMetadata)
         .where(RepositoryMetadata.repository_id == repository_id)
-        .order_by(RepositoryMetadata.changeset_revision, RepositoryMetadata.update_time.desc())
+        .order_by(RepositoryMetadata.changeset_revision, RepositoryMetadata.update_time.desc())  # type: ignore[attr-defined]  # mapped attribute
     )
     return session.scalars(stmt)