Enable support for deprecated pytz in Celery.

Set USE_DEPRECATED_PYTZ to True to ensure compatibility with legacy timezone handling in Celery. This change helps maintain existing behavior and prevents potential issues arising from the transition away from pytz.

fbr/config/settings/base.py

@@ -157,6 +157,7 @@
 )
 CELERY_TIMEZONE = "UTC"
 CELERY_ENABLE_UTC = True
+USE_DEPRECATED_PYTZ = True
 
 # Internationalisation
 LANGUAGE_CODE = "en-gb"