~x-ai/grok-latest → B (2:1)

B removes an entire dual-path legacy projection (GitDiscovery/Emission inventing epoch/commit pages) and forces Evidence-envelope-only reads, tightening Emission required fields and tests—lasting correctness for the ledger model. A is a sound but narrower storage refactor (Deque→List/Vec, trim-on-write→cap-on-read) that simplifies recent_votes without the same system-level invariant payoff.