feat: Lidarr searches for a better copy of a rip that has none (M498 #5447)

The operator chose option 2: an album holding a video rip that is the only
copy of its song is searched in Lidarr (AlbumSearch), at most once a week
and ten albums a pass. Lidarr grabs only when the quality profile allows an
upgrade, so nothing is removed and the rip stays held back either way.

- lidarr.Client.SearchAlbums posts the AlbumSearch command.
- ListAlbumsWithSoleCopyRips finds the albums: a held-back rip with no
  present clean copy sharing its song or its pending group, and not searched
  in the last week (audit action lidarr_rip_search).
- Suspect sources shows when Lidarr last searched the track's album.

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

internal/audit/audit.go

@@ -66,6 +66,11 @@ const (
 	// 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"