FEAT #13679 TIME 2:15 refactoring notification alerts

core/class/class_alert_engine.php

modules/notifications/batch/LoggerLog4php.php

modules/notifications/batch/basket_event_stack.php

modules/notifications/batch/load_basket_event_stack.php

modules/notifications/batch/load_process_event_stack.php

modules/notifications/batch/load_stack_letterbox_alerts.php

modules/notifications/batch/process_event_stack.php

modules/notifications/batch/stack_letterbox_alerts.php

src/app/docserver/models/DocserverTypeModelAbstract.php

src/app/notification/models/NotificationModelAbstract.php

src/app/resource/controllers/IndexingController.php