feat: search and grab — music release names, a quality ladder, a paced search schedule and one live grab per want (M502 #5521)

- internal/release: reads a release name (format, bitrate, bit depth and
  sample rate, source, year, video, discography) and judges it against the
  album wanted: the artist and title must be in it; video rips,
  discographies, other versions (drumless, instrumental, karaoke, remix,
  live unless the album is live…) and singles or EPs for an album are
  refused. Quality tiers on Lidarr's ladder; a .torrent's file list is read
  for format, video files and a track count short of the album.
- internal/acquire: fan-out across every search source with a narrowed
  search kept, a process-wide pacer per source, every candidate judged and
  kept with its reasons, and the grab: one live grab per want, tie-broken
  (a person's grab beats the schedule's; a better release replaces a worse
  one unless it is nearly done). Each download lands in its own folder
  under the client's downloads folder.
- internal/wanted: the search schedule, every ten minutes, never-searched
  first, then requests, missing files and followed artists, taking the
  best release when auto-grab is on (the default).
- Migration 0082: acquisition_settings (auto-grab, interval, allowed
  qualities seeded from Lidarr's "Any"), want search columns,
  want_candidates, grabs, release_blocks.
- Web: the Wanted page shows each want's last search, a Search button and
  every release found with its verdict (Grab, Grab anyway, Never this one,
  Allow again). Integrations gains "Searching and grabbing".

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

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

@@ -67,5 +67,11 @@
   "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."
+  "invalid_profile": "That isn't a release-type profile.",
+  "bad_interval": "Hours between searches must be between 0 and 720.",
+  "bad_quality": "Choose at least one quality to take.",
+  "candidate_not_found": "That release is no longer in the list. Search again.",
+  "no_infohash": "That release can't be set aside: its indexer gave no infohash to know it by.",
+  "want_held": "The library already holds that album.",
+  "block_not_found": "That release isn't set aside any more."
 }