9f384783e7
Follow-ups on the salvaged #54426 routing contract: - Bare `model` without `provider` on the OpenAI-compatible endpoints (/v1/chat/completions, /v1/responses) is now opt-in via gateway.platforms.api_server.direct_model_requests (default off) — generic OpenAI clients hardcode model names ('gpt-4o', ...) and existing deployments rely on those falling back to the gateway default. Explicit `provider` requests and the Hermes-native session-chat + /v1/runs surfaces are always honored. Idea credit: PR #22825 by @mssteuer. - A model_routes alias with no `model` key can no longer leak the alias string as the executing model name (defensive; parse-time validation already drops such routes). - Fix mis-indented _run_agent call args in _handle_session_chat_stream. - Docs: document the opt-in flag.