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/modules/billing/exceptions.py

@@ -1,14 +1,4 @@
-"""
-Billing Exceptions
-"""
-
-
-class InsufficientCreditsError(Exception):
-    """Raised when account doesn't have enough credits"""
-    pass
-
-
-class CreditCalculationError(Exception):
-    """Raised when credit calculation fails"""
-    pass
+# Backward compatibility aliases - exceptions moved to business/billing/
+from igny8_core.business.billing.exceptions import InsufficientCreditsError, CreditCalculationError
 
+__all__ = ['InsufficientCreditsError', 'CreditCalculationError']