Fix timeout system not starting on server start

This caused two things:

1. If the server could never contact the watchdog, timeouts didn't work.
2. If the server takes a long time to update, the timeout from the *previous* run would kill the next run.

SS14.Watchdog/Components/ServerManagement/ServerInstance.Actor.cs

@@ -378,6 +378,7 @@ private async Task StartServer(CancellationToken cancel)
         }
 
         MonitorServer(_startNumber, cancel);
+        StartTimeoutTimer();
     }
 
     private string GetProgramPath()