openai/gpt-chat-latest → A (5:1)

Commit A makes project-wide source changes that improve code quality and maintainability: it fixes Clippy warnings across multiple modules, enables a missing test by adding a #[test] attribute, introduces a type alias to simplify a complex signature, modernizes idioms, and adjusts shared integration-test helpers. While mostly non-functional, these changes directly affect the build and test hygiene of the codebase. Commit B only adds two documentation/planning files containing notes and architectural ideas without changing the implementation. Those documents may be useful for future work, but they do not immediately improve or modify the software itself.