Use explicit include for task modules instead of broken autodiscover

backend/app/tasks/celery_app.py

@@ -5,6 +5,7 @@ celery_app = Celery(
     "bornetime",
     broker=settings.redis_url,
     backend=settings.redis_url,
+    include=["app.tasks.process", "app.tasks.generate"],
 )
 
 celery_app.conf.update(
@@ -17,5 +18,3 @@ celery_app.conf.update(
     task_acks_late=True,
     worker_prefetch_multiplier=1,
 )
-
-celery_app.autodiscover_tasks(["app"])