add lastmodified and lastmodifiedid to table also add code for modified and create

CarParkValidationAPI/Models/ConcessionType.cs

@@ -21,6 +21,8 @@ namespace CarParkValidationAPI.Models
 		public string ConcessionDisplay { get; set; }
 
 		public bool Active { get; set; }
+		public DateTime? LastModified { get; set; }
+		public string? LastModifiedId { get; set; }
 		#endregion
 	}
 }