Weighing: Do not ignore gross and tare weight and show it on DeliveryNote

Elwig/Helpers/Weighing/WeighingEventArgs.cs

@@ -1,12 +1,7 @@
 using System;
 
 namespace Elwig.Helpers.Weighing {
-    public class WeighingEventArgs : EventArgs {
-
-        public WeighingResult Result { get; set; }
-
-        public WeighingEventArgs(WeighingResult result) {
-            Result = result;
-        }
+    public class WeighingEventArgs(WeighingResult result) : EventArgs {
+        public readonly WeighingResult Result = result;
     }
 }