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/business/automation/tasks.py

@@ -0,0 +1,28 @@
+"""
+Automation Celery Tasks
+"""
+from celery import shared_task
+import logging
+from igny8_core.business.automation.services.automation_service import AutomationService
+
+logger = logging.getLogger(__name__)
+
+
+@shared_task(name='igny8_core.business.automation.tasks.execute_scheduled_automation_rules')
+def execute_scheduled_automation_rules():
+    """
+    Execute all scheduled automation rules.
+    Called by Celery Beat.
+    """
+    try:
+        service = AutomationService()
+        result = service.execute_scheduled_rules()
+        logger.info(f"Executed scheduled automation rules: {result}")
+        return result
+    except Exception as e:
+        logger.error(f"Error executing scheduled automation rules: {str(e)}", exc_info=True)
+        return {
+            'success': False,
+            'error': str(e)
+        }
+