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7b7721f002
* feat(matcher): add Song.Artists (agents.Artist) and field-wise song dedup
* refactor(matcher): make song equality an agents.Song.Equals method via hashstructure
Move the sameSong free function from core/matcher into an Equals method on
agents.Song, following the model.MediaFile/Album.Equals convention. Uses strict
hashstructure hashing (nil opts, no IgnoreZeroValue) to preserve the original
whole-value equality contract. Tests moved to core/agents.
* feat(matcher): match by multiple artists with overlap ranking and artist-ID fast-path
* refactor(matcher): rank artist overlap and specificity above the preferred-track flag
Identity signals (specificityLevel, artistOverlap) now outrank the taste
signal (preferredMatch) in betterThan. A starred/4-star track that is a worse
identity match no longer beats a more specific or higher-overlap track.
PreferStarred still breaks ties when specificity and overlap are equal.
* fix(matcher): score artist-MBID specificity against all credited artists, not just the last
sanitizedTrack.artistMBID (string) replaced with artistMBIDs (map[string]struct{}) so
bucketTracks collects all credited owned MBIDs per query instead of last-write-wins.
computeSpecificityLevel tests set membership, letting each of a collaboration's
MBID-bearing artists reach the proper specificity level (4/5) independently.
* feat(plugins): carry multiple artists (with IDs) through SongRef conversions
* feat(plugins): regenerate schemas and PDK wrappers for multi-artist SongRef
* refactor(matcher): tidy bucketTracks accumulator and artist resolution
Replace bucketTracks' two parallel per-track maps (overlapByQuery/mbidsByQuery)
with a named queryAccum struct (F2). Collapse resolveArtists' four hand-mutated
parallel maps into a pendingArtist slice with derived nameToQueries/mbidToQueries
maps (F1). Replace the own() method on resolvedArtists with a package-level
addToSet helper that drops the method/receiver indirection (F3).
* docs(matcher): trim comments that restate the code
* fix(plugins): use Vec::is_empty for slice fields in generated Rust PDK
* fix(matcher): treat a resolved artist ID as an identity match for specificity
* docs(matcher): reflect artist-ID identity in the specificity ladder