feat: Minstrel no longer talks to Lidarr: its connection, Delete via Lidarr and the unmonitor options are gone, and the track reports are plain quarantine (M502 #5525)

Migration 0091 drops lidarr_config and renames the quarantine tables, types,
indexes and the history column off the Lidarr name. The Integrations Lidarr
card, the Reports "Delete via Lidarr" action, the merge and remove-track
unmonitor options, the Lidarr audit actions and error codes go, on the
server, web and Android. The README describes acquisition as it is now.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/coverart/embedded.go

@@ -23,7 +23,7 @@ var ErrNoEmbeddedArt = errors.New("coverart: no embedded album art")
 // usable picture; returns a wrapped error for I/O or tag-parse
 // failures so callers can distinguish "no art" from "couldn't read".
 //
-// Picard- and Lidarr-tagged libraries typically carry the canonical
+// Picard-tagged libraries typically carry the canonical
 // art in this block already — extracting it beats every external API
 // guess for accuracy and avoids a network round-trip.
 func ExtractEmbeddedAlbumArt(path string) ([]byte, error) {

internal/coverart/enricher.go

@@ -91,7 +91,7 @@ func (e *Enricher) EnrichAlbum(ctx context.Context, albumID pgtype.UUID) error {
 
 	// Embedded layer: read the picture stored inside the audio file's
 	// tag block (ID3v2 APIC, FLAC METADATA_BLOCK_PICTURE, MP4 covr).
-	// Picard/Lidarr-tagged libraries typically carry the canonical art
+	// Picard-tagged libraries typically carry the canonical art
 	// here, so this beats every external provider for accuracy and
 	// avoids the network round-trip.
 	if row.TrackFilePath != nil && *row.TrackFilePath != "" {