add CompleteName to dtos Post and PostMessage

Tsi1.Api/Tsi1.BusinessLayer/Dtos/PostMessagePreviewDto.cs

@@ -16,5 +16,7 @@ namespace Tsi1.BusinessLayer.Dtos
 
         public int PostId { get; set; }
 
+        public string CompleteName { get; set; }
+
     }
 }