* DevUI: Use metadata.entity_id for agent/workflow name instead of model field * OpenAI Responses: add explicit request validation * Review feedback
* Improve fidelity of OpenAI Responses server and add Conversations * Merge * nit * Undo prior change * Undo prior change * Review feedback * Review feedback * Fix test * Use simpler JsonDocument approach for polymorphic deserialization * More review feedback * dotnet format