openai/gpt-chat-latest → A (4:1)

Side A changes the project's storage design by replacing the durable recent-vote deque with an append-only list, removing per-apply trimming, moving the cap to query time, bumping the schema version, and adding a regression test that verifies only the newest 200 votes are loaded. Side B is a useful refactoring of the integration test infrastructure (shared HTTP/OAuth helpers, common build/env functions, and reduced duplication), but it primarily improves test maintainability rather than changing core project behavior.