added lu fs files controller 404 test

Luticate2.Utils/Controllers/LuFsFilesCrudController.cs

 using Luticate2.Utils.Dbo.Basic;
 using Luticate2.Utils.Dbo.FsFiles;
 using Luticate2.Utils.Dbo.PaginatedRequest;
+using Luticate2.Utils.Dbo.Result;
 using Luticate2.Utils.Interfaces;
 using Luticate2.Utils.Utils;
 using Microsoft.AspNetCore.Http;
         public virtual IActionResult GetSingleByIdRaw([Required]string id, bool forceDownload = false)
         {
             var get = Business.GetSingleById(id);
+            if (get.Status == LuStatus.NotFound)
+            {
+                return StatusCode(404);
+            }
             if (!get)
             {
                 throw new LuResultException(get.To<object>());