openai/gpt-chat-latest → A (4:1)

Side A adds a new GitHub Actions workflow that automatically deploys the Fly.io application on pushes to main, including concurrency control, checkout, flyctl setup, and deployment, creating an ongoing automation improvement. Side B only removes a rust-toolchain.toml file to avoid toolchain conflicts in CI; while it can fix a specific build issue, it is a much smaller configuration adjustment with narrower lasting impact.