## Summary
Adds a new mcp tool call, `codex-reply`, so we can continue existing
sessions. This is a first draft and does not yet support sessions from
previous processes.
## Testing
- [x] tested with mcp client
## Summary
- add OpenAI retry and timeout fields to Config
- inject these settings in tests instead of mutating env vars
- plumb Config values through client and chat completions logic
- document new configuration options
## Testing
- `cargo test -p codex-core --no-run`
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https://chatgpt.com/codex/tasks/task_i_68792c5b04cc832195c03050c8b6ea94
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Co-authored-by: Michael Bolin <mbolin@openai.com>
