Update dagster-openlineage lockfile

[cmpadden]

Summary

• refresh dagster-openlineage uv.lock with latest compatible dependency versions

Testing

• uv lock --upgrade in libraries/dagster-openlineage

[cmpadden]

Pulled the failing check logs with gh. The failure was caused by the lockfile moving Dagster to 1.13, where the old dagster.core compatibility namespace is gone. Updated the compatibility helper to prefer dagster._core.events and adjusted tests to import/assert the current dagster._core module paths. Ran uv run pytest -q in libraries/dagster-openlineage locally: 130 passed. Pushed the fix to this branch.