Update methods to be internal, remove invocation bloat

Assets/Scripts/Core/SceneManagerService.cs

@@ -47,7 +47,7 @@ namespace Core
         // ManagedBehaviour configuration
         public override int ManagedAwakePriority => 15; // Core infrastructure, after GameManager
 
-        protected override void OnManagedAwake()
+        internal override void OnManagedAwake()
         {
             // Set instance immediately (early initialization)
             _instance = this;
@@ -63,7 +63,7 @@ namespace Core
             }
         }
 
-        protected override void OnManagedStart()
+        internal override void OnManagedStart()
         {
             // Set up loading screen reference and events
             // This must happen in ManagedStart because LoadingScreenController instance needs to be set first