ReferenceapiHandler for `POST /api/v1/llm/backends/:name/set-default`.Handler for `POST /api/v1/llm/backends/:name/set-default`. POST /api/v1/llm/backends/:name/set-default Marks the given backend as the default. Returns 404 if not found. Request Responses200404500503Backend marked as defaultBackend not foundRepository errorBackend repository not available