add stream_options to openai model (#5788)

stream_options are not part of the model classes, so they won't get
serialized when calling dump_component. Adding this to the model allows
us to store the stream options when the component is serialized.
---------

Signed-off-by: Peter Jausovec <peter.jausovec@solo.io>
Co-authored-by: Eric Zhu <ekzhu@users.noreply.github.com>

python/packages/autogen-ext/src/autogen_ext/models/openai/_openai_client.py

@@ -1112,6 +1112,7 @@ class OpenAIChatCompletionClient(BaseOpenAIChatCompletionClient, Component[OpenA
             "this is content" becomes "Reviewer said: this is content."
             This can be useful for models that do not support the `name` field in
             message. Defaults to False.
+        stream_options (optional, dict): Additional options for streaming. Currently only `include_usage` is supported.
 
     Examples:
 

python/packages/autogen-ext/src/autogen_ext/models/openai/config/__init__.py

@@ -10,6 +10,10 @@ class ResponseFormat(TypedDict):
     type: Literal["text", "json_object"]
 
 
+class StreamOptions(TypedDict):
+    include_usage: bool
+
+
 class CreateArguments(TypedDict, total=False):
     frequency_penalty: Optional[float]
     logit_bias: Optional[Dict[str, int]]
@@ -22,6 +26,7 @@ class CreateArguments(TypedDict, total=False):
     temperature: Optional[float]
     top_p: Optional[float]
     user: str
+    stream_options: Optional[StreamOptions]
 
 
 AsyncAzureADTokenProvider = Callable[[], Union[str, Awaitable[str]]]
@@ -67,6 +72,7 @@ class CreateArgumentsConfigModel(BaseModel):
     temperature: float | None = None
     top_p: float | None = None
     user: str | None = None
+    stream_options: StreamOptions | None = None
 
 
 class BaseOpenAIClientConfigurationConfigModel(CreateArgumentsConfigModel):