feat: a wanted list — follow artists on release-type profiles; requests and re-acquisition become wants (M502 #5520)

Minstrel keeps its own list of what it is to get, keyed by MusicBrainz
release group. A want comes from an approved request, a new release by a
followed artist, or an album whose files went missing, and is held once the
library has a full edition of it.

- Migration 0081: release_type_profiles (Standard seeded: Album, EP,
  Single, studio only), follows, follow_seen_groups and wants.
  lidarr_requests becomes requests with plain *_mbid columns; approved
  album and track requests move onto the wanted list, approved artist
  requests become follows, and the library's album artists start out
  followed. missing_reacquisitions and the retry settings go.
- internal/wanted: follows are checked against MusicBrainz discographies
  daily. The first check sets a baseline, and only releases after it are
  wanted unless the follow asked for what already exists. Profiles filter
  by primary and secondary type, so live recordings stay out unless a
  profile ticks Live.
- internal/requests (was lidarrrequests): approving puts the request on
  the wanted list, and an artist request can be approved on a chosen
  profile. A request completes when its want is held.
- The re-acquisition sweeper wants a missing album back instead of asking
  Lidarr; searching for it is the search schedule's (#5521).
- Web: an admin Wanted page (Wanted, Missing files, Held, Following), a
  follow control on artist pages, a release-type profiles card on
  Integrations, "Approve on a profile" on Requests, and want state on
  Missing files. The artist detail API returns the artist's MBID.
- Android: the request body sends artist_mbid, album_mbid and track_mbid.

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

internal/db/queries/merge.sql

@@ -35,8 +35,8 @@ UPDATE contextual_likes SET track_id = sqlc.arg(survivor_id)::uuid WHERE track_i
 -- name: MergeRepointPlaybackErrors :execrows
 UPDATE playback_errors SET track_id = sqlc.arg(survivor_id)::uuid WHERE track_id = sqlc.arg(loser_id)::uuid;
 
--- name: MergeRepointLidarrRequests :execrows
-UPDATE lidarr_requests SET matched_track_id = sqlc.arg(survivor_id)::uuid
+-- name: MergeRepointRequests :execrows
+UPDATE requests SET matched_track_id = sqlc.arg(survivor_id)::uuid
  WHERE matched_track_id = sqlc.arg(loser_id)::uuid;
 
 -- name: MergeRepointPlaylistTracks :many