Fix: Return NormalizedResponse from send_openai_compatible

This resolves the issue where calling 'send_openai_compatible' discarded the NormalizedResponse details, resulting in an AttributeError when accessing 'raw_response' inside the tool loop.

src/openai_compatible.py

@@ -64,7 +64,7 @@ def send_openai_compatible(
  request: OpenAICompatibleRequest,
  *,
  capabilities: Any,
-) -> Result[str]:
+) -> Result[NormalizedResponse]:
  kwargs: dict[str, Any] = {
   "model": request.model,
   "messages": request.messages,
@@ -83,9 +83,10 @@ def send_openai_compatible(
    response = _send_streaming(client, kwargs, request.stream_callback)
   else:
    response = _send_blocking(client, kwargs)
-  return Result(data=response.text)
+  return Result(data=response)
  except OpenAIError as exc:
-  return Result(data="", errors=[_classify_openai_compatible_error(exc, source="openai_compatible")])
+  empty_resp = NormalizedResponse(text="", tool_calls=[], usage_input_tokens=0, usage_output_tokens=0, usage_cache_read_tokens=0, usage_cache_creation_tokens=0, raw_response=None)
+  return Result(data=empty_resp, errors=[_classify_openai_compatible_error(exc, source="openai_compatible")])
 
 def _send_blocking(client: Any, kwargs: dict[str, Any]) -> NormalizedResponse:
  resp = client.chat.completions.create(**kwargs)