Use new change tracker from Chronos

CHANGELOG.rst

@@ -14,6 +14,7 @@ Changed
 
 * Let untis_import_mysql management command default to ``current`` instead of all
   to prevent accidental imports of old plans
+* Use new change tracker from Chronos to trigger notifications
 
 `2.1.3`_ - 2022-02-06
 ---------------------

aleksis/apps/untis/util/mysql/main.py

@@ -5,6 +5,7 @@ from django.db.models import QuerySet
 import reversion
 from tqdm import tqdm
 
+from aleksis.apps.chronos.util.change_tracker import TimetableDataChangeTracker
 from aleksis.apps.untis.util.mysql.importers.terms import import_terms
 from aleksis.apps.untis.util.mysql.util import TQDM_DEFAULTS
 
@@ -35,6 +36,8 @@ def untis_import_mysql(terms: Optional[QuerySet] = None, version: Optional[int]
         with reversion.create_revision(atomic=True):
             reversion.set_comment(f"Untis import for validity range {validity_range}")
 
+            tracker = TimetableDataChangeTracker()
+
             # Common data for Chronos
             subjects_ref = import_subjects(validity_range)
             rooms_ref = import_rooms(validity_range)