feat(db): add user-context track query variants honoring quarantine

internal/db/dbq/recommendation.sql.go

@@ -34,6 +34,10 @@ WHERE t.id <> $2
     WHERE user_id = $1 AND track_id = t.id
       AND started_at > now() - $3 * interval '1 hour'
   )
+  AND NOT EXISTS (
+    SELECT 1 FROM lidarr_quarantine q
+    WHERE q.user_id = $1 AND q.track_id = t.id
+  )
 `
 
 type LoadRadioCandidatesParams struct {
@@ -117,6 +121,10 @@ excluded_ids AS (
     SELECT pe.track_id AS id
     FROM play_events pe
     WHERE pe.user_id = $1 AND pe.started_at > now() - $3 * interval '1 hour'
+    UNION ALL
+    SELECT q.track_id AS id
+    FROM lidarr_quarantine q
+    WHERE q.user_id = $1
 ),
 lb_similar AS (
     SELECT ts.track_b_id AS track_id, ts.score AS sim_score