8 test files had _DummyConfigManager missing get_active_media_server(),
causing failures when pytest ran them before the test file that had it.
Whichever file set sys.modules first won, and the incomplete dummy broke
later tests. Also fix script.js read_text() missing encoding='utf-8'
which failed on non-UTF-8 default locales.
Album completeness and any other repair job now uses the centralized source/client helpers instead of a worker-local Spotify client or override plumbing
- This keeps source selection aligned with the configured primary provider and removes the last Spotify-only special case from the job path.
This change ultimately is a step towards further centralizing the Spotify client access and the associated `is_spotify_authenticated` check.
- Currently these look-ups are done all over the place in different feature implementations directly, but moving forward, any feature that uses `get_primary_client` or `get_client_for_source` to access the Spotify client, won't have to duplicate any rate-limiting or auth checks as long as these getters are used
Album completeness and downstream repair flow now follow the configured
primary provider first, with Discogs and Hydrabase support added alongside
existing Spotify, iTunes, and Deezer paths.
Keep spotify_track_id for compatibility while preserving source-aware track
IDs for provider-neutral handling.
