Add Codex (codex-1) to o3 and o4-mini system card — enhanced software engineering agent

AI Impact Summary

The addition of Codex, powered by the codex-1 model, represents a significant enhancement to our coding agent capabilities. This model leverages reinforcement learning and a focus on human coding style to generate code that closely aligns with our team's preferences and iterative testing practices. This capability will accelerate software development by automating code generation and reducing the need for manual debugging, particularly for complex tasks.