[P0][OPS] Commit-ordered rollback playbooks for TTD integration

[flyingrobots]

Owner: Release Engineer\nEstimate: 4h\nDepends on: release policy\nAC:\n- full/partial rollback sequences\n- dependency constraints\n- post-revert checks\n- docs/ROLLBACK_TTD.md

[flyingrobots]

Not sure what this one means... Closing.