fix(lidarr): complete a request only when the album actually came back (#5263)

Re-acquisition targets albums with ANY track missing, and completion only
asked for a track on disk, so the tracks that never left completed every
re-acquisition request the moment Lidarr accepted the add (52 on the deploy,
each ~150ms after its add).

An album or track request now completes when an album named by its release
or group has a track on disk AND either a track arrived after the request
(a new album, or Lidarr fetching another release into its own row) or no
track that was missing at the request is still missing. added_at is the
arrival clock; updated_at moves on every tag re-read.

Migration 0071 reopens completed album/track requests whose matched album
fails that test, as approved with the match cleared; the Lidarr add stays
confirmed, so nothing is re-sent.

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

internal/db/migrations/0071_reopen_false_reacquisition_completions.up.sql

@@ -0,0 +1,30 @@
+-- #5263: the reconciler completed album and track requests as soon as the album
+-- had any track on disk. Re-acquisition targets albums with only SOME tracks
+-- missing, so those requests completed the moment Lidarr accepted the add,
+-- with nothing downloaded.
+--
+-- Reopen every completed album/track request whose matched album does not meet
+-- the corrected test (see albumForRequest in internal/lidarrrequests): a track
+-- that arrived after the request, or no track that was already missing at the
+-- request still missing. The reconciler then judges them again; the Lidarr add
+-- stays confirmed, so nothing is re-sent. Requests that genuinely completed
+-- meet the test and are left alone.
+UPDATE lidarr_requests lr
+   SET status           = 'approved',
+       completed_at     = NULL,
+       matched_album_id = NULL,
+       matched_track_id = NULL,
+       updated_at       = now()
+ WHERE lr.status = 'completed'
+   AND lr.kind IN ('album', 'track')
+   AND lr.matched_album_id IS NOT NULL
+   AND NOT EXISTS (
+         SELECT 1 FROM tracks t
+          WHERE t.album_id = lr.matched_album_id
+            AND t.missing_since IS NULL
+            AND t.added_at > lr.requested_at)
+   AND EXISTS (
+         SELECT 1 FROM tracks t
+          WHERE t.album_id = lr.matched_album_id
+            AND t.missing_since IS NOT NULL
+            AND t.missing_since < lr.requested_at);