openai/gpt-chat-latest → B (3:2)

Side B introduces a durable architectural change by replacing the string-based `CanonicalItemUrl` with a structured `ItemId` type, propagating it through the reducer, ranking, routing, RPC, and tests while extracting shared normalization into `item_wire.rs`. Side A adds valuable deployment infrastructure, production configuration, and a live audit dashboard with SSE/status APIs, but much of its impact is operational and UI-oriented, whereas B changes the project's core identity model in a way that simplifies future development and reduces reliance on ad hoc string handling.