[Behavioral] OpenAI: Status code no longer documented

OpenAI's published API specification no longer documents the 409 status code for the POST /organization/projects/{project_id}/service_accounts/{service_account_id}/api_keys endpoint, according to an API change tracker that flags the removal as a behavioral change. The update affects code that reads responses from that service-account API-key creation endpoint, where 409 previously appeared and is now absent. The tracker classifies the change as either a dead branch or an undocumented response that callers may still receive.