Add DEMO feature to the project

services/demo_session/app/services/__init__.py

@@ -0,0 +1,7 @@
+"""Demo Session Services"""
+
+from .session_manager import DemoSessionManager
+from .data_cloner import DemoDataCloner
+from .cleanup_service import DemoCleanupService
+
+__all__ = ["DemoSessionManager", "DemoDataCloner", "DemoCleanupService"]