Why: bind the task validation checkpoint to the integration baseline. Evidence: SELF recursive component checks; sync_base=aa3c7eae40264ee47d5505a162074cfd77b1a099; before_record=304d1a82f4093ad58e7c1df1ffcaa18b433352cc. Impact: task metadata only. Refs: .task/feature-development-governance-v2.md