The previous fix called client.users() unconditionally to validate the
user_id, adding an extra HTTP round-trip before the build. On a slow
Jellyfin connection this burned through the 10s timeout before the
actual libraries() call.
Restructured to try libraries(user_id) directly first. Only when that
fails does the worker resolve the username via the users API. So:
- Correctly configured user_id (internal hash): zero extra round-trips.
- Username like 'admin': libraries() fails → users() resolves it → retry.
283 backend tests pass; ruff clean.
Developer
67c51f9fc0