Implement content synchronization from WordPress and Shopify in ContentSyncService

- Added methods to sync content from WordPress and Shopify to IGNY8, including error handling and logging.
- Introduced internal methods for fetching posts from WordPress and products from Shopify.
- Updated IntegrationService to include a method for retrieving active integrations for a site.
- Enhanced test cases to cover new functionality and ensure proper setup of test data, including industry and sector associations.

backend/igny8_core/business/site_building/tests/test_bulk_generation.py

@@ -19,6 +19,9 @@ class BulkGenerationTestCase(SiteBuilderTestBase):
     def setUp(self):
         """Set up test data"""
         super().setUp()
+        # Delete the base page_blueprint so we control exactly which pages exist
+        self.page_blueprint.delete()
+        
         self.page1 = PageBlueprint.objects.create(
             account=self.account,
             site=self.site,