Improve Program.cs startup: safer log folder creation, CORS policy, and middleware order

This pull request includes several improvements to the ASPNET/Program.cs startup file for better robustness, safety, and maintainability:

1. Safe Logs Folder Creation

   • Wrapped log folder creation in a try-catch block to prevent crashes in environments with restricted permissions.
   • Ensures the Serilog logs folder is always safely initialized.

2. Serilog Configuration

   • Configured rolling file logging to wwwroot/app_data/logs/app.log for better log management.
   • Properly closes and flushes logs on application shutdown.

3. CORS Policy

   • Added an explicit "AllowAll" CORS policy.
   • Prevents runtime errors due to missing default CORS policy and ensures API can be called from frontend apps.

4. Middleware Order Adjustment

   • Moved GlobalApiExceptionHandlerMiddleware after authentication and authorization middleware.
   • Ensures that auth exceptions are properly captured and logged.

5. Safe Application Startup

   • Wrapped app.Run() in try-catch with Serilog fatal logging.
   • Prevents unhandled exceptions from crashing the application without logging.

These changes improve application stability, provide better error tracking, and make the startup process more predictable, especially in production environments.