request_changes and reopen_review_task no longer reset
consecutive_failures (and last_failure_error) to 0 — review transitions
are neither success nor failure signals, so the circuit-breaker counter
is preserved (not incremented either), mirroring unblock_task (#35072).
Only complete_task's success path clears the counter.
Regression: counter=1 survives a full request_review -> request_changes
-> re-request cycle; a crash after request_changes accumulates to 2 and
trips a failure_limit=2 breaker; complete_task still resets to 0.
Teknium