Treat completed question-response deliveries as history only after their exact same-company handoff finishes. Preserve missing evidence, retries, accounting debt, and idle-sleep fences.
Add a concurrent all-state question history index with interrupted-build repair. Keep migrations serialized without waiting snapshots that deadlock concurrent index builds.
Validated by 118 focused sleep tests, six migration/snapshot tests, full repository typecheck, all CI gates, and Apex 5/5.
Co-Authored-By: Paperclip <noreply@paperclip.ing>
