feat: autotag scoring overhaul, dump-based explore index, and lyrics search

Consolidates in-progress work across autotag, explore, and library:

- autotag: beets/Picard-informed scoring engine — ID-first matching, VA
  handling, recommendation tiers, and a merged distance/rank cascade, with
  an eval harness for regression tracking.
- explore: offline MusicBrainz dump import/incremental refresh replaces the
  legacy tier crawl; index-first local search with fuzzy matching and a
  dedicated ranker; disk-free guards for dump downloads.
- library: artist-credit extraction and matching.
- lyrics: owned-library lyric search (FTS) with LRCLIB backfill.

Also: rewrite README to be user-focused, and migrate upstream to
git.ljones.me/yonlu/yellowjacket.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

go.mod

@@ -13,11 +13,14 @@ require (
 	github.com/godbus/dbus/v5 v5.1.0
 	github.com/golang-cz/devslog v0.0.15
 	github.com/gopxl/beep/v2 v2.1.1
+	github.com/klauspost/compress v1.17.9
+	github.com/parquet-go/parquet-go v0.30.1
 	github.com/wailsapp/wails/v2 v2.10.2
 	go.uploadedlobster.com/mbtypes v0.4.0
 	go.uploadedlobster.com/musicbrainzws2 v0.18.0
 	golang.org/x/image v0.12.0
 	golang.org/x/sync v0.19.0
+	golang.org/x/sys v0.41.0
 	golang.org/x/text v0.34.0
 	golang.org/x/time v0.15.0
 	modernc.org/sqlite v1.46.1
@@ -62,7 +65,7 @@ require (
 	github.com/alfatraining/structtag v1.0.0 // indirect
 	github.com/alingse/asasalint v0.0.11 // indirect
 	github.com/alingse/nilnesserr v0.2.0 // indirect
-	github.com/andybalholm/brotli v1.1.0 // indirect
+	github.com/andybalholm/brotli v1.1.1 // indirect
 	github.com/antlr4-go/antlr/v4 v4.13.1 // indirect
 	github.com/ashanbrown/forbidigo/v2 v2.3.0 // indirect
 	github.com/ashanbrown/makezero/v2 v2.1.0 // indirect
@@ -254,9 +257,12 @@ require (
 	github.com/nishanths/exhaustive v0.12.0 // indirect
 	github.com/nishanths/predeclared v0.2.2 // indirect
 	github.com/nunnatsa/ginkgolinter v0.23.0 // indirect
+	github.com/parquet-go/bitpack v1.0.0 // indirect
+	github.com/parquet-go/jsonlite v1.0.0 // indirect
 	github.com/pelletier/go-toml v1.9.5 // indirect
 	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
 	github.com/pganalyze/pg_query_go/v6 v6.1.0 // indirect
+	github.com/pierrec/lz4/v4 v4.1.21 // indirect
 	github.com/pingcap/errors v0.11.5-0.20240311024730-e056997136bb // indirect
 	github.com/pingcap/failpoint v0.0.0-20240528011301-b51a646c7c86 // indirect
 	github.com/pingcap/log v1.1.0 // indirect
@@ -321,6 +327,7 @@ require (
 	github.com/tkrajina/go-reflector v0.5.8 // indirect
 	github.com/tomarrell/wrapcheck/v2 v2.12.0 // indirect
 	github.com/tommy-muehle/go-mnd/v2 v2.5.1 // indirect
+	github.com/twpayne/go-geom v1.6.1 // indirect
 	github.com/ultraware/funlen v0.2.0 // indirect
 	github.com/ultraware/whitespace v0.2.0 // indirect
 	github.com/uudashr/gocognit v1.2.0 // indirect
@@ -355,7 +362,6 @@ require (
 	golang.org/x/exp/typeparams v0.0.0-20260209203927-2842357ff358 // indirect
 	golang.org/x/mod v0.33.0 // indirect
 	golang.org/x/net v0.50.0 // indirect
-	golang.org/x/sys v0.41.0 // indirect
 	golang.org/x/telemetry v0.0.0-20260209163413-e7419c687ee4 // indirect
 	golang.org/x/term v0.40.0 // indirect
 	golang.org/x/tools v0.42.0 // indirect