Added an event for edit-and-retry feature (#438)

Author: SzymonPobiega

src/ServiceControl.Contracts.Tests/ApprovalFiles/APIApprovals.PublicClr.approved.txt

@@ -48,6 +48,11 @@ namespace ServiceControl.Contracts
         public System.Guid HostId { get; set; }
         public System.DateTime LastReceivedAt { get; set; }
     }
+    public class MessageEditedAndRetried
+    {
+        public MessageEditedAndRetried() { }
+        public string FailedMessageId { get; set; }
+    }
     public class MessageFailed
     {
         public MessageFailed() { }

src/ServiceControl.Contracts/MessageEditedAndRetried.cs

@@ -0,0 +1,13 @@
+namespace ServiceControl.Contracts
+{
+    /// <summary>
+    /// Event emitted by ServiceControl when edit-and-retry feature is used.
+    /// </summary>
+    public class MessageEditedAndRetried
+    {
+        /// <summary>
+        /// The unique identifier of the message that was edited
+        /// </summary>
+        public string FailedMessageId { get; set; }
+    }
+}