An empty season deck was three truths wearing one message, and the one
it chose to blame was wrong: a season on the per-episode lane sat on
"sweeping indexers…" for the full wait and then blamed a backoff for a
pack search that was never going to run.
`GET /api/series/{id}/seasons/{n}/pack-state` says which lane the
season takes and why, from `season_grab_reason` in arr-core, plus the
failed-pack tally and when #181's window reopens. Seasons gain
`last_pack_search_at`, written only by a season-scoped sweep, so a
pack search that ran and found nothing is a settled answer rather than
a pending one.
The deck then says the true thing in each case, and a season held off
the pack lane by a failure offers the retry that waives its window.
Refs #182
A failed season-pack grab held the season off the pack lane forever:
pack_hard_failed was a bare EXISTS over failed grabs, so one bad
torrent disabled pack search for good, against §6.2's "it never gives
up entirely, it goes quiet".
The guard now rides the shared backoff curve (backoff_elapsed, 1h → 6h
→ 1d → 3d, capped 7d), counting failed pack grabs as attempts and
anchoring on the latest one's grabbed_at. Both the targeted and RSS
lanes agree. A manual season search waives the window outright — the
season deck is §6.2's escape hatch.
Closes#181.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>