Update Sisyphus fallback chain to include gpt-5.2-codex and gemini-3-pro Files: AGENTS.md, README*.md, src/agents/AGENTS.md Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>