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/api/catalogue.go

@@ -21,11 +21,10 @@ import (
 // catalogueSearchLimit is how many results one search shows.
 const catalogueSearchLimit = 25
 
-// catalogueSearchResult is one row of GET /api/catalogue/search. The shape is
-// the one the Lidarr search answered with, so the Discover page and request
-// rows read it unchanged. artist_mbid and album_mbid are the parents a
+// catalogueSearchResult is one row of GET /api/catalogue/search, read by the
+// Discover page and request rows. artist_mbid and album_mbid are the parents a
 // request needs: empty on an artist, the artist on an album, both on a track.
-// An album is a MusicBrainz release group, as Lidarr's albums were.
+// An album is a MusicBrainz release group.
 type catalogueSearchResult struct {
 	MBID          string `json:"mbid"`
 	Name          string `json:"name"`