HIGH: renamed TestP2_RebuildClosure_FullBase_OneChain → TestP2_RebuildClosure_OneChain.
Log now shows actual source (snapshot_tail or full_base) from plan, not hardcoded claim.
MED: catch-up test uses t.Skipf when V1 interim prevents OutcomeCatchUp.
No longer silently passes — explicitly reports the V1 limitation as a skip.
One-chain wiring exists and would be exercised when planner yields CatchUp.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>