A claim whose enrichment surfaced context.Canceled while the sweep was
still live was released uncounted, leaving it immediately reclaimable and
invisible to the no-progress circuit breaker. Let it flow through the
failure path as a transient error so it backs off and is counted; genuine
sweep shutdown still releases via the existing ctx check.
Claims discarded because the item vanished are terminal, not retried, so
report them in a new discarded counter instead of inflating deferred, and
surface the count in task progress output.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
