Implemented the initial authentication and user management system for Athenaeum

Completed:

• Created the User Database model
• Added authentication and user schemas
• Implemented authentication and user API routed
• Added Password hashing and security utilities
• Created the authentication service layer
• Set up database session management
• Configured application settings
• Added Redis client integration
• Set up Alembic database migrations
• Created the initial users table migration
• Organized the backend into API , core , database , schemas and services

The backend now has a structured foundation for authentication and user