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/content/services/__init__.py

@@ -0,0 +1,4 @@
+"""
+Content services
+"""
+

backend/igny8_core/business/content/services/content_generation_service.py

@@ -0,0 +1,75 @@
+"""
+Content Generation Service
+Handles content generation business logic
+"""
+import logging
+from igny8_core.business.content.models import Tasks
+from igny8_core.business.billing.services.credit_service import CreditService
+from igny8_core.business.billing.exceptions import InsufficientCreditsError
+
+logger = logging.getLogger(__name__)
+
+
+class ContentGenerationService:
+    """Service for content generation operations"""
+    
+    def __init__(self):
+        self.credit_service = CreditService()
+    
+    def generate_content(self, task_ids, account):
+        """
+        Generate content for tasks.
+        
+        Args:
+            task_ids: List of task IDs
+            account: Account instance
+        
+        Returns:
+            dict: Result with success status and data
+        
+        Raises:
+            InsufficientCreditsError: If account doesn't have enough credits
+        """
+        # Get tasks
+        tasks = Tasks.objects.filter(id__in=task_ids, account=account)
+        
+        # Calculate estimated credits needed
+        total_word_count = sum(task.word_count or 1000 for task in tasks)
+        
+        # Check credits
+        try:
+            self.credit_service.check_credits(account, 'content_generation', total_word_count)
+        except InsufficientCreditsError:
+            raise
+        
+        # Delegate to AI task (actual generation happens in Celery)
+        from igny8_core.ai.tasks import run_ai_task
+        
+        try:
+            if hasattr(run_ai_task, 'delay'):
+                # Celery available - queue async
+                task = run_ai_task.delay(
+                    function_name='generate_content',
+                    payload={'ids': task_ids},
+                    account_id=account.id
+                )
+                return {
+                    'success': True,
+                    'task_id': str(task.id),
+                    'message': 'Content generation started'
+                }
+            else:
+                # Celery not available - execute synchronously
+                result = run_ai_task(
+                    function_name='generate_content',
+                    payload={'ids': task_ids},
+                    account_id=account.id
+                )
+                return result
+        except Exception as e:
+            logger.error(f"Error in generate_content: {str(e)}", exc_info=True)
+            return {
+                'success': False,
+                'error': str(e)
+            }
+