openai/gpt-chat-latest → A (4:1)

Side A fixes several functional issues across the voting flow: it correctly passes the delegate attribution out-of-band instead of embedding it in the DSL text, stops incorrectly falling back to all items when the sibling pool is too small by returning no next pair, removes the unnecessary swap control, and consistently renames the route from `/vote/compare` to `/vote` across handlers and tests. Side B fixes a real but narrowly scoped startup/runtime bug by defining `GITHUB_API_BASE_URL` with a default, preventing a NameError in the GitHub OAuth path.