#77 FTX-77: RunFlow terminal wiring + sync worker (P2)

runflow_sync_jobs outbox written inside terminalize transaction (approved->approve post-clearance UN-RF-1; rejected/timed_out->reject EV-RF-3; changes_requested per behavior; cancelled->leave_waiting); workers/runflow_sync.py SKIP LOCKED loop, backoff 5s-4h, permanent-fail -> dead + runflow_sync_error audit (EV-RF-4); HITL state authoritative. Phase 7.