Remove warnings suppression for multiprocessing in run scripts

- Eliminated unnecessary warnings suppression related to multiprocessing resource tracking in `run.py` and `run_parallel_simulation.py`, streamlining the code and reducing potential confusion.
- This change enhances clarity in logging by allowing relevant warnings to be displayed during execution, improving traceability and debugging capabilities.

backend/scripts/run_parallel_simulation.py

@@ -39,8 +39,6 @@ import warnings
 from datetime import datetime
 from typing import Dict, Any, List, Optional, Tuple
 
-# 抑制 multiprocessing resource_tracker 的警告（来自第三方库如 transformers）
-warnings.filterwarnings("ignore", message=".*resource_tracker.*")
 
 # 全局变量：用于信号处理
 _shutdown_event = None