Response Reviewer — Structured-Output Extension (Packs-and-Bundles Foundation)

Extend the shipped response-store schema and the shipped Response Reviewer remote to support pack-shaped responses — structured candidates with confidence-band pills, a five-value outcome enum, and a sibling-payload + archival-markdown shape — without breaking the free-form text responses that today's prompt-runs produce. Zero packs ship in this work. Zero bundles ship. The deliverable is the surface that every pack will land on, exercised by a small fixture of mock pack responses so the renderer can be felt in all three theme modes before any real pack exists.