Refactor environment and Celery configuration setup

Relocated Django settings initialization in manage.py into the main function for improved execution. Updated Celery configuration to load settings from Django's settings module, ensuring consistency and adaptability in different environments.

fbr/config/celery.py

@@ -8,7 +8,7 @@
 
 celery_app = Celery("fbr_celery")
 
-celery_app.config_from_object("fbr.config.settings.local", namespace="CELERY")
+celery_app.config_from_object("django.conf:settings", namespace="CELERY")
 
 celery_app.autodiscover_tasks()
 

fbr/manage.py

@@ -1,18 +1,12 @@
-# flake8: noqa
-
 #!/usr/bin/env python
 """Django's command-line utility for administrative tasks."""
 import os
 import sys
 
-os.environ.setdefault("DJANGO_SETTINGS_MODULE", "config.settings.local")
-import django
-
-django.setup()
-
 
 def main():
     """Run administrative tasks."""
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "config.settings.local")
 
     try:
         from django.core.management import execute_from_command_line