fix(Core/Vehicles): Prevent accessory double-install and respawn orphans (#25499)

Co-authored-by: blinkysc <blinkysc@users.noreply.github.com>

src/server/game/Maps/Map.cpp

@@ -346,8 +346,7 @@ bool Map::AddToMap(T* obj, bool checkTransport)
     //also, trigger needs to cast spell, if not update, cannot see visual
     obj->UpdateObjectVisibility(true);
 
-    // Xinef: little hack for vehicles, accessories have to be added after visibility update so they wont fall off the vehicle, moved from Creature::AIM_Initialize
-    // Initialize vehicle, this is done only for summoned npcs, DB creatures are handled by grid loaders
+    // Post-visibility so accessories seat after the vehicle's create packet reaches clients.
     if (obj->IsCreature())
         if (Vehicle* vehicle = obj->ToCreature()->GetVehicleKit())
             vehicle->Reset();