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>

web/src/lib/styles/error-copy.json

@@ -56,5 +56,16 @@
   "playlist_not_found": "That playlist no longer exists.",
   "user_not_found": "That user no longer exists.",
   "service_not_found": "That connection no longer exists. Refresh the page.",
-  "too_many_services": "There are already twenty of these. Remove one you no longer use first."
+  "too_many_services": "There are already twenty of these. Remove one you no longer use first.",
+  "bad_state": "That isn't a tab of the wanted list.",
+  "bad_profile": "That isn't a release-type profile.",
+  "not_followable": "Various Artists and MusicBrainz placeholders can't be followed.",
+  "profile_not_found": "That release-type profile no longer exists. Refresh the page.",
+  "profile_invalid": "A profile needs a name and at least one primary type.",
+  "profile_name_taken": "A profile already has that name.",
+  "profile_in_use": "Artists are followed on this profile. Move them to another one first.",
+  "profile_is_default": "The default profile can't be deleted. Make another one the default first.",
+  "want_not_found": "That's no longer on the wanted list. Refresh the page.",
+  "follow_not_found": "That artist isn't followed any more. Refresh the page.",
+  "invalid_profile": "That isn't a release-type profile."
 }