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/db/dbq/system_mixes.sql.go

@@ -43,7 +43,7 @@ SELECT t.id, t.album_id, t.artist_id
    AND COALESCE(pc.c, 0) <= 2
    AND COALESCE(sc.c, 0) < 2
    AND NOT EXISTS (
-       SELECT 1 FROM lidarr_quarantine q
+       SELECT 1 FROM quarantine q
         WHERE q.user_id = $1 AND q.track_id = t.id
    )
  ORDER BY md5(t.id::text || $2::text)
@@ -129,7 +129,7 @@ SELECT t.id, t.album_id, t.artist_id, alt.tier::int AS tier
    AND alt.tier IS NOT NULL
    AND NOT EXISTS (SELECT 1 FROM attempted a WHERE a.track_id = t.id)
    AND NOT EXISTS (
-       SELECT 1 FROM lidarr_quarantine q
+       SELECT 1 FROM quarantine q
         WHERE q.user_id = $1 AND q.track_id = t.id
    )
  ORDER BY
@@ -229,7 +229,7 @@ SELECT t.id, t.album_id, t.artist_id, alt.tier::int AS tier
   JOIN albums_tiered alt ON alt.album_id = t.album_id
  WHERE t.missing_since IS NULL   -- #2523: never offer a file that is gone
    AND NOT EXISTS (
-       SELECT 1 FROM lidarr_quarantine q
+       SELECT 1 FROM quarantine q
         WHERE q.user_id = $1 AND q.track_id = t.id
    )
  ORDER BY alt.tier, alt.created_at DESC, t.album_id,
@@ -308,7 +308,7 @@ SELECT t.id, t.album_id, t.artist_id
   JOIN windowed w ON w.track_id = t.id
  WHERE t.missing_since IS NULL   -- #2523: never offer a file that is gone
    AND NOT EXISTS (
-       SELECT 1 FROM lidarr_quarantine q
+       SELECT 1 FROM quarantine q
         WHERE q.user_id = $1 AND q.track_id = t.id
    )
  ORDER BY w.c DESC, md5(t.id::text || $2::text)
@@ -375,7 +375,7 @@ SELECT t.id, t.album_id, t.artist_id
    AND s.c >= 3
    AND s.last_at <= now() - interval '30 days'
    AND NOT EXISTS (
-       SELECT 1 FROM lidarr_quarantine q
+       SELECT 1 FROM quarantine q
         WHERE q.user_id = $1 AND q.track_id = t.id
    )
    -- Declined-resurfacing cooldown (#1258): a skip on a