Enhance Content Management with New Taxonomy and Attribute Models

- Introduced `ContentTaxonomy` and `ContentAttribute` models for improved content categorization and attribute management.
- Updated `Content` model to support new fields for content format, cluster role, and external type.
- Refactored serializers and views to accommodate new models, including `ContentTaxonomySerializer` and `ContentAttributeSerializer`.
- Added new API endpoints for managing taxonomies and attributes, enhancing the content management capabilities.
- Updated admin interfaces for `Content`, `ContentTaxonomy`, and `ContentAttribute` to reflect new structures and improve usability.
- Implemented backward compatibility for existing attribute mappings.
- Enhanced filtering and search capabilities in the API for better content retrieval.

backend/igny8_core/modules/planner/views.py

@@ -926,8 +926,8 @@ class ContentIdeasViewSet(SiteSectorModelViewSet):
     ordering_fields = ['idea_title', 'created_at', 'estimated_word_count']
     ordering = ['-created_at']  # Default ordering (newest first)
     
-    # Filter configuration
-    filterset_fields = ['status', 'keyword_cluster_id', 'content_structure', 'content_type']
+    # Filter configuration (updated for new structure)
+    filterset_fields = ['status', 'keyword_cluster_id', 'site_entity_type', 'cluster_role']
     
     def perform_create(self, serializer):
         """Require explicit site_id and sector_id - no defaults."""