b800e63137
- Remove unused _write_sse_chat_completion pseudo-streaming method (dead code) - Extract _resolve_model() helper in gateway/run.py, use from api_server - Cache streaming config at GatewayRunner init instead of YAML parsing per-message - Add API_SERVER_* env vars to OPTIONAL_ENV_VARS for hermes setup integration - Add security warning about network exposure without API_SERVER_KEY