Why: bind the task validation checkpoint to the latest integration baseline. Evidence: SELF recursive component checks; sync_base=a70ed114fba2d51bb93ec8cb0662703ab0bc0614; candidate=c2c0e45d4241a3b86bf820c93c8b1d5015ff613b. Impact: task metadata only. Refs: .task/feature-rdm-u2-closeout.md