chore: update OpenAPI spec from monorepo (#1026)

Co-authored-by: OpenRouter SDK Bot <sdk-bot@openrouter.ai>

Author: openrouter-docs-sync[bot]

.speakeasy/in.openapi.yaml

@@ -29867,7 +29867,7 @@ components:
             - 'switchyard-router'
           type: 'string'
         judge_model:
-          description: 'The model that runs the judge call for the judge-backed algorithms ("capability", "stage", and "composite"). The model must support structured outputs and have a provider that your account and request settings allow. Otherwise, the request uses the platform default judge, google/gemini-2.5-flash-lite, and reports the reason in the routing metadata. The judge call is billed to you like any other request.'
+          description: 'The model that runs the judge call for the judge-backed algorithms ("capability", "stage", and "composite"). The model must support structured outputs and have a provider that your account and request settings allow. Otherwise, the request uses the platform default judge, google/gemini-3.5-flash-lite, or openai/gpt-4o-mini when the default does not fit either, and reports the reason in the routing metadata. The judge call is billed to you like any other request.'
           example: 'openai/gpt-5.4-nano'
           minLength: 1
           type: 'string'