Two issues with this one:
1. It tests implementation.
2. It was part of `TidalPluginTest` base class, so it ran multiple times
in every class that used this mixin:
$ pytest -vv test/plugins/test_tidal.py | grep flex_field_types
test/plugins/test_tidal.py::TidalPluginTest::test_flex_field_types_are_scoped_correctly PASSED
test/plugins/test_tidal.py::TestAlbumParsing::test_flex_field_types_are_scoped_correctly PASSED
test/plugins/test_tidal.py::TestTrackParsing::test_flex_field_types_are_scoped_correctly PASSED
test/plugins/test_tidal.py::TestTrackForID::test_flex_field_types_are_scoped_correctly PASSED
test/plugins/test_tidal.py::TestTracksForIDs::test_flex_field_types_are_scoped_correctly PASSED
test/plugins/test_tidal.py::TestAlbumForID::test_flex_field_types_are_scoped_correctly PASSED
test/plugins/test_tidal.py::TestAlbumsForIDs::test_flex_field_types_are_scoped_correctly PASSED
test/plugins/test_tidal.py::TestCandidates::test_flex_field_types_are_scoped_correctly PASSED
test/plugins/test_tidal.py::TestItemCandidates::test_flex_field_types_are_scoped_correctly PASSED
test/plugins/test_tidal.py::TestTidalsync::test_flex_field_types_are_scoped_correctly PASSED
- Add item_types ClassVar with tidal_track_id, tidal_album_id,
tidal_artist_id, tidal_track_popularity, tidal_alb_popularity,
tidal_updated fields
- Populate flexattrs during album/track import via AlbumInfo/TrackInfo
kwargs
- Add beet tidalsync command to refresh popularity data post-import
- Add tidal fields to REIMPORT_FRESH_FIELDS_ITEM for reimport support
- Add tests for flexattr population and tidalsync behavior
- Update tidal plugin docs with attribute reference and tidalsync usage
- Renamed id to _id
- Aligned line breaks for some comment with actual ruff line length
- Removed comment dividers
- Removed a number of unnecessary or duplicate comments
