Why: bind the task validation checkpoint to the latest integration baseline. Evidence: SELF recursive component checks; sync_base=0933a3be588739f867abebaa3aa4c0283d005e40; candidate=c2df06a3e5589b46814e66d7ee4001729198dbd8. Impact: task metadata only. Refs: .task/feature-rdm-u5-closeout.md