Added feature to track messages sent by the bot by reference so they can be edited

KfChatDotNetBot/Models/SentMessageTrackerModel.cs

@@ -0,0 +1,23 @@
+namespace KfChatDotNetBot.Models;
+
+public class SentMessageTrackerModel
+{
+    // Unique GUID for each message
+    public required string Reference { get; set; }
+    public required string Message { get; set; }
+    public required SentMessageTrackerStatus Status { get; set; }
+    public int? ChatMessageId { get; set; }
+    // Timespan from when the message was sent until we saw it come back
+    public TimeSpan? Delay { get; set; }
+    public DateTimeOffset? SentAt { get; set; }
+}
+
+public enum SentMessageTrackerStatus
+{
+    WaitingForResponse,
+    ResponseReceived,
+    // If the bot is blocked from sending the message, e.g. due to suppress chat messages being enabled 
+    NotSending,
+    // Shouldn't happen normally, it's just set before the bot has made a decision on whether to send or not,
+    Unknown
+}