Why: bind the task validation checkpoint to the integration baseline. Evidence: SELF recursive component checks; sync_base=d2663ef9e28d9d4a8e47bb65a5e02532fdfa78ab; before_record=380e1924c1dd09367d966f97010851d9f5437259. Impact: task metadata only. Refs: .task/archive/fix-backend-repin-resolve-hitl.md