fix(Delivery): avoid unused vehicle wrapping when opening Gamepad

S1API.Tests/Deliveries/LoadingDockApiTests.cs

@@ -82,6 +82,20 @@ public void EventsExposeManagedPreviousAndCurrentValues()
             GetEvent(nameof(LoadingDock.AcceptingItemsChanged)).EventHandlerType);
     }
 
+    [Fact]
+    public void StaticOccupantSubscribersAreTracked()
+    {
+        var nativeDock = TestObjectFactory.CreateUninitialized<S1Delivery.LoadingDock>();
+        var dock = new LoadingDock(nativeDock);
+        Action<LandVehicle?, LandVehicle?> handler = (_, _) => { };
+
+        Assert.False(dock.HasStaticOccupantChangedSubscribers);
+        dock.StaticOccupantChanged += handler;
+        Assert.True(dock.HasStaticOccupantChangedSubscribers);
+        dock.StaticOccupantChanged -= handler;
+        Assert.False(dock.HasStaticOccupantChangedSubscribers);
+    }
+
     [Fact]
     public void ManagedNotificationsSuppressNoOpsAndIsolateSubscribers()
     {

S1API/Deliveries/LoadingDock.cs

@@ -144,6 +144,8 @@ public PropertyWrapper? Property
         /// </summary>
         public event Action<LandVehicle?, LandVehicle?>? StaticOccupantChanged;
 
+        internal bool HasStaticOccupantChangedSubscribers => StaticOccupantChanged != null;
+
         /// <summary>
         /// Raised after the accepting-items state changes.
         /// </summary>

S1API/Internal/Deliveries/LoadingDockEventBridge.cs

@@ -37,7 +37,11 @@ internal static void NotifyStaticOccupantChanged(
             if (previous == current)
                 return;
 
-            LoadingDock.Wrap(native).NotifyStaticOccupantChanged(
+            var dock = LoadingDock.Wrap(native);
+            if (!dock.HasStaticOccupantChangedSubscribers)
+                return;
+
+            dock.NotifyStaticOccupantChanged(
                 VehicleRegistry.Wrap(previous),
                 VehicleRegistry.Wrap(current));
         }