feat: store shard status in Redis

PluralKit.Core/Utils/ProtobufUtils.cs

@@ -0,0 +1,22 @@
+using Google.Protobuf;
+
+namespace PluralKit.Core;
+
+public static class Proto
+{
+    private static Dictionary<string, MessageParser> _parser = new();
+
+    public static byte[] Marshal(this IMessage message) => message.ToByteArray();
+
+    public static T Unmarshal<T>(this byte[] message) where T : IMessage<T>, new()
+    {
+        var type = typeof(T).ToString();
+        if (_parser.ContainsKey(type))
+            return (T)_parser[type].ParseFrom(message);
+        else
+        {
+            _parser.Add(type, new MessageParser<T>(() => new T()));
+            return Unmarshal<T>(message);
+        }
+    }
+}