Fixes for library client (#587)

Library client used _server_ side types which was no bueno. The fix here
is not the completely correct fix but it is good for enough and for the
demo notebook.

llama_stack/apis/agents/agents.py

@@ -340,9 +340,8 @@ class AgentTurnResponseStepProgressPayload(BaseModel):
     step_type: StepType
     step_id: str
 
-    model_response_text_delta: Optional[str] = None
+    text_delta: Optional[str] = None
     tool_call_delta: Optional[ToolCallDelta] = None
-    tool_response_text_delta: Optional[str] = None
 
 
 @json_schema_type

llama_stack/apis/agents/event_logger.py

@@ -121,7 +121,7 @@ class EventLogger:
                         else:
                             yield event, LogEvent(
                                 role=None,
-                                content=event.payload.model_response_text_delta,
+                                content=event.payload.text_delta,
                                 end="",
                                 color="yellow",
                             )