Forward OpenAI-compatible frequency_penalty, presence_penalty, and seed params through the gateway/chat-completions path while keeping Responses untouched.
Verification:
- pnpm test src/gateway/openai-http.test.ts src/agents/pi-embedded-runner/extra-params.sampling.test.ts src/agents/openai-transport-stream.test.ts
- CI passed on head 9abb9466d9 after rerunning cancelled jobs: preflight, critical quality network-runtime-boundary, security high, checks, docs, Real behavior proof.
Co-authored-by: lellansin <lellansin@gmail.com>