fix: use kwargs.get("stream_options") to avoid KeyError

Co-authored-by: OhYee <13498329+OhYee@users.noreply.github.com>

Author: Copilot

agentrun/model/api/data.py

@@ -54,7 +54,7 @@ def completions(
             **self.headers,
             **kwargs.get("headers", {}),
         }
-        if kwargs["stream_options"] is None:
+        if kwargs.get("stream_options") is None:
             kwargs["stream_options"] = {}
         kwargs["stream_options"]["include_usage"] = True
 
@@ -86,7 +86,7 @@ def responses(
             **self.headers,
             **kwargs.get("headers", {}),
         }
-        if kwargs["stream_options"] is None:
+        if kwargs.get("stream_options") is None:
             kwargs["stream_options"] = {}
         kwargs["stream_options"]["include_usage"] = True
         from litellm import responses