BOLT-1439 triage-wait watchdog: repeat Linear evidence check after 72h if still Backlog

Follow-up from 2026-07-05 72h BOLT-1439 watchdog. At lease: (1) query BOLT-1439 state + comments since 2026-07-05T04:40:57Z; (2) if state != Backlog OR any human comment since the watchdog comment, task event + complete; (3) if still Backlog with no response, empirically re-run the substrate check (fleet-tasks retry_count>=3, poison-pill, or lease-expired events since 2026-07-05T04:40Z), add ONE Linear comment on BOLT-1439 with evidence — no Carson DM (Core Rule #11 + escalation-loop-prevention); (4) if this reaches N=3 escalations with no response, promote to AGENTS.md as an escalation-loop-detection rule and DM Carson once with the arc summary.