chore: update OpenAPI spec from monorepo (#632)

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

Author: openrouter-docs-sync[bot]

.speakeasy/in.openapi.yaml

@@ -18344,7 +18344,7 @@ components:
             type: 'object'
           type: 'array'
         failure_reason:
-          description: 'Typed failure reason when the fusion run failed. Possible values include: all_panels_failed, insufficient_credits, rate_limited, judge_not_valid_json, judge_schema_mismatch, judge_upstream_error, judge_empty_completion. The four analysis-stage codes keep their pre-rename `judge_` spelling so existing consumers keep matching.'
+          description: 'Typed failure reason when the fusion run failed. Possible values include: all_panels_failed, insufficient_credits, rate_limited, invalid_model, judge_not_valid_json, judge_schema_mismatch, judge_upstream_error, judge_empty_completion. The four analysis-stage codes keep their pre-rename `judge_` spelling so existing consumers keep matching.'
           type: 'string'
         id:
           type: 'string'