Don't enqueue construction events without validation (#39869)

Content.Server/Construction/ConstructionSystem.Interactions.cs

@@ -570,6 +570,10 @@ namespace Content.Server.Construction
                 handled.Handled = true;
             }
 
+            // Make sure the event passes validation before enqueuing it
+            if (HandleEvent(uid, args, true, construction) != HandleResult.Validated)
+                return;
+
             // Enqueue this event so it'll be handled in the next tick.
             // This prevents some issues that could occur from entity deletion, component deletion, etc in a handler.
             construction.InteractionQueue.Enqueue(args);