- Identifier-first resolution (ISRC/Deezer/Spotify) before falling back to text search
- Score-based match selection via _metadataMatchScore instead of provider order
- Pass sourceTrackId from TrackMetadataScreen into _EditMetadataSheet
- Refactor buildDeezerExtendedMetadataResult and buildDeezerISRCSearchResult as testable helpers
- Add unit tests for buildDeezerExtendedMetadataResult and buildDeezerISRCSearchResult
- Propagate copyright through Deezer enrichment chain (exports, extension_providers)
