fix up startup for server/fileserver and change commands to be guild commands for the discord bot + clean up unauthorized vanity uid users

MareSynchronosServer/MareSynchronosStaticFilesServer/Startup.cs

@@ -40,6 +40,7 @@ public class Startup
                 InitialBackoff = TimeSpan.FromSeconds(1),
                 MaxBackoff = TimeSpan.FromSeconds(5),
                 BackoffMultiplier = 1.5,
+                RetryableStatusCodes = { Grpc.Core.StatusCode.Unavailable }
             }
         };