openai/gpt-chat-latest → B (3:1)

Side B performs a substantive type-safety refactor by changing `resolve_item` to return `CanonicalItemUrl` instead of `String`, propagating strongly typed canonical URLs throughout ranking, validation, and RPC code, eliminating repeated parsing/wrapping and reducing opportunities for misuse. Side A adds useful infrastructure (Dockerfile, Fly deployment config, event log, and view persistence), but much of it is deployment/support code and new utilities, whereas B improves the core API design and correctness across many existing code paths with lasting architectural value.