lazy init encryption

tests/app/celery/test_service_callback_tasks.py

@@ -5,7 +5,7 @@ import pytest
 import requests_mock
 from freezegun import freeze_time
 
-from app import encryption
+from app import get_encryption
 from app.celery.service_callback_tasks import (
     send_complaint_to_service,
     send_delivery_status_to_service,
@@ -20,6 +20,8 @@ from tests.app.db import (
     create_template,
 )
 
+encryption = get_encryption()
+
 
 @pytest.mark.parametrize(
     "notification_type", [NotificationType.EMAIL, NotificationType.SMS]