`wrapAISDKModel` fails on Groq's `openai/gpt-oss-120b`

As per title, the wrapper won't work with groq models.


```
AI_APICallError: Generated JSON does not match the expected schema. Please adjust your prompt. See 'failed_generation' for more details. Error: jsonschema: '' does not validate with /additionalProperties: additionalProperties 'additionalProperties', 'properties', 'required', 'type', '$schema' not allowed
```