add optional restart save timeout

Torch.Server/TorchConfig.cs

@@ -121,6 +121,9 @@ public class TorchConfig : ViewModel, ITorchConfig
 
     [Display(Name = "Packages", Description = "Packages to install and use.", GroupName = "Server")]
     public List<string> Packages { get; set; } = new();
+    
+    [Display(Name = "Restart Save Timeout", Description = "Timeout for save operation on restart in seconds.", GroupName = "Server")]
+    public int RestartSaveTimeout { get; set; }
 
     // for backward compatibility
     public void Save(string path = null) => Initializer.Instance?.ConfigPersistent?.Save(path);