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- 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>