Add scheduled automation task and update URL routing

- Introduced a new scheduled task for executing automation rules every 5 minutes in the Celery beat schedule.
- Updated URL routing to include a new endpoint for automation-related functionalities.
- Refactored imports in various modules to align with the new business layer structure, ensuring backward compatibility for billing models, exceptions, and services.

backend/igny8_core/urls.py

@@ -29,6 +29,7 @@ urlpatterns = [
     path('api/v1/writer/', include('igny8_core.modules.writer.urls')),
     path('api/v1/system/', include('igny8_core.modules.system.urls')),
     path('api/v1/billing/', include('igny8_core.modules.billing.urls')),  # Billing endpoints
+    path('api/v1/automation/', include('igny8_core.modules.automation.urls')),  # Automation endpoints
     # OpenAPI Schema and Documentation
     path('api/schema/', SpectacularAPIView.as_view(), name='schema'),
     path('api/docs/', SpectacularSwaggerView.as_view(url_name='schema'), name='swagger-ui'),