fix(release): package Core migration runtime

alembic/env.py

@@ -5,7 +5,11 @@ from logging.config import fileConfig
 from alembic import context
 from sqlalchemy import engine_from_config, pool
 
-from govoplan_access.backend.db import models as access_models  # noqa: F401 - populate access metadata
+try:
+    from govoplan_access.backend.db import models as access_models  # noqa: F401 - populate optional access metadata
+except ModuleNotFoundError as exc:
+    if exc.name != "govoplan_access":
+        raise
 from govoplan_core.admin import models as core_admin_models  # noqa: F401 - populate core admin metadata
 from govoplan_core.core import change_sequence as core_change_sequence_models  # noqa: F401 - populate core metadata
 from govoplan_core.core.migrations import migration_metadata_plan