auto calculating tracked_time and estimated_time both for master and sub task

be/app/Providers/EventServiceProvider.php

@@ -2,6 +2,10 @@
 
 namespace App\Providers;
 
+use App\Models\MasterTask;
+use App\Models\SubTask;
+use App\Observers\MasterTaskObserver;
+use App\Observers\SubTaskObserver;
 use Illuminate\Auth\Events\Registered;
 use Illuminate\Auth\Listeners\SendEmailVerificationNotification;
 use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;
@@ -27,7 +31,8 @@ class EventServiceProvider extends ServiceProvider
      */
     public function boot()
     {
-        //
+        MasterTask::observe( MasterTaskObserver::class);
+        SubTask::observe( SubTaskObserver::class);
     }
 
     /**