- Add test_concurrent_put_objects to test_storage.py (STORE-07: verifies no
per-instance lock blocks concurrent MinIO workers via asyncio.gather)
- Remove @pytest.mark.xfail from test_confirm_endpoint; test now passes on
SQLite after uuid format fix in api/documents.py
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>