fix: return result for together's get_params (#1484)

# What does this PR do?

- return results for together's get_params
- fix issue
<img width="1538" alt="image"
src="https://github.com/user-attachments/assets/c4cd3802-85ef-4ff3-b2fd-76737be2e4ff"
/>

- the `return params` was accidentally deleted in
https://github.com/meta-llama/llama-stack/pull/1362/files#diff-d9345410ea64589cee96487b22eab0d45f7497a80c25dca295cecd254decb204

[//]: # (If resolving an issue, uncomment and update the line below)
[//]: # (Closes #[issue-number])

## Test Plan
```
npm test examples
```


[//]: # (## Documentation)

llama_stack/providers/remote/inference/together/together.py

@@ -32,9 +32,7 @@ from llama_stack.apis.inference import (
 )
 from llama_stack.distribution.request_headers import NeedsRequestProviderData
 from llama_stack.log import get_logger
-from llama_stack.providers.utils.inference.model_registry import (
+from llama_stack.providers.utils.inference.model_registry import ModelRegistryHelper
-    ModelRegistryHelper,
-)
 from llama_stack.providers.utils.inference.openai_compat import (
     convert_message_to_openai_dict,
     get_sampling_options,
@@ -227,6 +225,7 @@ class TogetherInferenceAdapter(ModelRegistryHelper, Inference, NeedsRequestProvi
             **self._build_options(request.sampling_params, request.logprobs, request.response_format),
         }
         logger.debug(f"params to together: {params}")
+        return params
 
     async def embeddings(
         self,