Enhance simulation management and logging features

- Registered a cleanup function for simulation processes to ensure proper termination on server shutdown.
- Improved logging during application startup to confirm the registration of the cleanup function.
- Updated simulation preparation checks to clarify the conditions for considering a simulation ready, enhancing error handling and user feedback.
- Added detailed logging for simulation status changes, improving traceability during the simulation lifecycle.
- Introduced new files for simulation configuration and profile data, supporting enhanced testing and visualization capabilities.

backend/app/__init__.py

@@ -31,6 +31,12 @@ def create_app(config_class=Config):
     # 启用CORS
     CORS(app, resources={r"/api/*": {"origins": "*"}})
     
+    # 注册模拟进程清理函数（确保服务器关闭时终止所有模拟进程）
+    from .services.simulation_runner import SimulationRunner
+    SimulationRunner.register_cleanup()
+    if should_log_startup:
+        logger.info("已注册模拟进程清理函数")
+    
     # 请求日志中间件
     @app.before_request
     def log_request():