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/audit/audit.go

@@ -61,16 +61,6 @@ const (
 	// log can answer "where did that file go" long after the report is gone.
 	ActionDuplicateMerge Action = "duplicate_merge"
 
-	// Lidarr release change (M498 #5437): the duplicate resolver moved an
-	// album's monitored release in Lidarr to one that lists each song once.
-	// Written with no actor; the metadata names the album and both releases.
-	ActionLidarrReleaseChange Action = "lidarr_release_change"
-
-	// Lidarr rip search (M498 #5447): the resolver asked Lidarr to search an
-	// album whose only copy of a song is a video rip, for a better release.
-	// Written with no actor; the metadata names the album and how many rips.
-	ActionLidarrRipSearch Action = "lidarr_rip_search"
-
 	// Subsonic password (#5026): generated in Settings for t/s-only clients.
 	ActionSubsonicPasswordSet   Action = "subsonic_password_set"
 	ActionSubsonicPasswordClear Action = "subsonic_password_clear"