OpenAI-compatible compute-backend preset (config only, reuses LLM_BACKEND=openai) for pointing a supplier node at the HuggingFace Inference Providers router. Adds a boot guard that rejects the OpenRouter-only reasoning param against the HF router, unit tests, and an operator runbook.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
