Cleaned up request acks. Added internal service bus for internal messaging.

Bus/ServiceBusData.cs

@@ -0,0 +1,18 @@
+namespace TwitchChatTTS.Bus
+{
+    public class ServiceBusData
+    {
+        public string Topic { get; }
+        public object? Sender { get; }
+        public object? Value { get; }
+        public DateTime Timestamp { get; }
+
+        public ServiceBusData(object sender, string topic, object value)
+        {
+            Topic = topic;
+            Sender = sender;
+            Value = value;
+            Timestamp = DateTime.UtcNow;
+        }
+    }
+}