Fix basedpyright type errors (#25435)

Signed-off-by: -LAN- <laipz8200@outlook.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/core/agent/cot_agent_runner.py

@@ -72,6 +72,8 @@ class CotAgentRunner(BaseAgentRunner, ABC):
         function_call_state = True
         llm_usage: dict[str, Optional[LLMUsage]] = {"usage": None}
         final_answer = ""
+        prompt_messages: list = []  # Initialize prompt_messages
+        agent_thought_id = ""  # Initialize agent_thought_id
 
         def increase_usage(final_llm_usage_dict: dict[str, Optional[LLMUsage]], usage: LLMUsage):
             if not final_llm_usage_dict["usage"]:

api/core/agent/fc_agent_runner.py

@@ -54,6 +54,7 @@ class FunctionCallAgentRunner(BaseAgentRunner):
         function_call_state = True
         llm_usage: dict[str, Optional[LLMUsage]] = {"usage": None}
         final_answer = ""
+        prompt_messages: list = []  # Initialize prompt_messages
 
         # get tracing instance
         trace_manager = app_generate_entity.trace_manager