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/config/config.go

@@ -106,7 +106,7 @@ func Default() Config {
 		Log:      LogConfig{Level: "info", Format: "text"},
 		Branding: BrandingConfig{
 			AppName:     "Minstrel",
-			Description: "Self-hosted music server with Subsonic compatibility, smart shuffle, and Lidarr integration.",
+			Description: "Self-hosted music server with Subsonic compatibility, smart shuffle, and music acquisition.",
 		},
 		Events: EventsConfig{
 			SessionTimeoutMinutes:   30,