Add CreatedDate and OriginalCreatedDate properties

Author: ma-chni

src/MigrationTools/DataContracts/RevisionItem.cs

@@ -9,10 +9,12 @@ public class RevisionItem
         public int Index { get; set; }
         public int Number { get; set; }
         public DateTime ChangedDate { get; set; }
-
         public DateTime OriginalChangedDate { get; set; }
+
+        public DateTime CreatedDate { get; set; }
+        public DateTime OriginalCreatedDate { get; set; }
         public string Type { get; set; }
         public Dictionary<string, FieldItem> Fields { get; set; }
         public Dictionary<string, EnricherData> EnricherData { get; set; }
     }
-}
+}