Fold sidecars (.nfo, .sfv, .nzb) apart from their upload into it

"Murdoch Mysteries S8D1 [00/80] - \"….nzb\"" beside its "[01/94]" upload
was a release of its own (23k sidecar-only releases on the corpus, 15k with
the poster's bigger release within 10 minutes). The settler queues small
settled releases (fold_candidates); the merger's third pass folds one whose
files are all sidecars into the poster's bigger release in the same group
within 10 minutes: the one sharing a 4+ letter word with its subject, else
the one under the same counter total, else none (via 'sidecar').

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

app/services/settler.ts

@@ -27,8 +27,11 @@ class Settler {
            UPDATE releases SET settled_at = now(), complete = CASE WHEN file_total IS NULL THEN NULL ELSE files >= file_total END
            WHERE id IN (SELECT id FROM releases WHERE settled_at IS NULL AND last_seen_at < now() - make_interval(mins => ?)
              AND (last_seen_at < now() - make_interval(hours => ?) OR coalesce(last_posted_at, posted_at) < now() - make_interval(hours => ?)) LIMIT ?)
-           RETURNING id, readable),
-         marked AS (UPDATE probe_candidates pc SET ready = true, unreadable = NOT s.readable FROM settled s WHERE pc.release_id = s.id)
+           RETURNING id, readable, files, bytes, poster),
+         marked AS (UPDATE probe_candidates pc SET ready = true, unreadable = NOT s.readable FROM settled s WHERE pc.release_id = s.id),
+         -- Small ones may be an upload's .nfo or .nzb that came apart from it: the merger's sidecar fold looks at them.
+         queued AS (INSERT INTO fold_candidates (release_id) SELECT id FROM settled WHERE files <= 3 AND bytes < 1000000 AND poster IS NOT NULL
+           ON CONFLICT DO NOTHING)
          SELECT count(*)::int AS n FROM settled`,
         [QUIET_HISTORY_MINUTES, QUIET_HOURS, QUIET_HOURS, BATCH]
       )