openai/gpt-chat-latest → A (5:2)

Side A introduces a substantial identity model change by making UUIDs the canonical account identity, adding Reddit OAuth support, implementing provider linking with conflict handling, exposing linked providers privately, updating routing, storage, and projection logic, and fixing trust-weight batching with tests. Side B adds a useful pairwise voting UI flow and item ID normalization, but much of it is feature/UI work and refactoring, whereas Side A establishes a broader, lasting authentication and identity architecture affecting core account behavior.