iomgaa
121888a0eb
Round 8 forensics caught the healthy source circuit-opened by five random empty completions (~20% ambient failure rate makes a 5-streak land every ~3000 attempts), blacking out the only good source for 60s. When the window holds min_calls samples below the failure-rate threshold, a streak is noise and no longer opens the gate; cold-start and low-traffic semantics are unchanged and sudden death of a warm source is still caught by the rate channel.