FAILURE_COUNTS persisted across runs but was never reset on success —
confirmed live 2026-07-19 that Sekirei S06E04 sat permanently flagged
chronic at count 4 despite already having hasFile=true. "Consecutive
failures" was really being measured as cumulative-for-all-time. Now
prunes any media_id's count at the end of each arr's pass if it no
longer appears in that run's problem-item set, so a resolved item's
history doesn't linger and falsely trip the circuit breaker later.