Make sure datasync tasks are always loaded

src/pretix/base/apps.py

@@ -47,6 +47,7 @@ class PretixBaseConfig(AppConfig):
         from . import notifications  # NOQA
         from . import email  # NOQA
         from .services import auth, checkin, currencies, export, mail, tickets, cart, modelimport, orders, invoices, cleanup, update_check, quotas, notifications, vouchers  # NOQA
+        from .datasync import datasync  # NOQA
         from .models import _transactions  # NOQA
         from django.conf import settings