Last life cycle refactor updates + add comprehensive documentation (#57)

Co-authored-by: Michal Pikulski <michal.a.pikulski@gmail.com>
Reviewed-on: #57

Assets/Scripts/Bootstrap/BootSceneController.cs

@@ -30,8 +30,6 @@ namespace Bootstrap
         private float _sceneLoadingProgress = 0f;
         private LogVerbosity _logVerbosity = LogVerbosity.Warning;
 
-        // Run very early - need to set up loading screen before other systems initialize
-        public override int ManagedAwakePriority => 5;
 
         internal override void OnManagedAwake()
         {
@@ -83,10 +81,8 @@ namespace Bootstrap
             Invoke(nameof(StartLoadingMainMenu), minDelayAfterBoot);
         }
 
-        protected override void OnDestroy()
+        internal override void OnManagedDestroy()
         {
-            base.OnDestroy();
-            
             // Manual cleanup for events
             if (initialLoadingScreen != null)
             {