Add logging configuration to prevent Celery from overriding Django's logging setup

mnemosyne/mnemosyne/celery.py

@@ -1,5 +1,6 @@
 import os
 from celery import Celery
+from celery.signals import setup_logging
 
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mnemosyne.settings")
 
@@ -10,3 +11,18 @@ app.config_from_object("django.conf:settings", namespace="CELERY")
 
 # Auto-discover tasks from all registered Django app configs
 app.autodiscover_tasks()
+
+
+@setup_logging.connect
+def config_loggers(*args, **kwargs):
+    """
+    Prevent Celery from overriding Django's logging configuration.
+
+    Celery normally replaces all logging handlers at worker startup. Connecting
+    to this signal tells Celery to skip its own logging setup entirely, so the
+    LOGGING config in settings.py remains in effect for worker processes.
+    """
+    from logging.config import dictConfig
+    from django.conf import settings
+
+    dictConfig(settings.LOGGING)