openai/gpt-chat-latest → B (3:2)

Side B fixes multiple concrete failures in the OAuth test infrastructure that were breaking end-to-end authentication: it corrects request parsing (`getRequestBody` instead of `getInputStream`, regex-based query splitting), prevents null-related crashes, fixes redirect handling, and wraps mock handlers to return diagnostics instead of crashing. Side A improves URL generation by using display paths and substantially strengthens the vote-pool test with full pairwise coverage and ranking assertions, but much of its patch is expanded test logic rather than core functionality, whereas Side B restores a foundational test/auth flow used across the project.