fix: cleanup scheduled tasks

app/Models/Application.php

@@ -48,6 +48,9 @@ class Application extends BaseModel
             $application->persistentStorages()->delete();
             $application->environment_variables()->delete();
             $application->environment_variables_preview()->delete();
+            foreach ($application->scheduled_tasks as $task) {
+                $task->delete();
+            }
             $application->tags()->detach();
         });
     }