- Introduced `auth_token_repo` for handling auth token operations in Redis.
- Created `chat_repo` for managing chat sessions and messages in Redis.
- Implemented `ChatService` and `AuthService` to encapsulate business logic for chat and authentication.
- Updated routes to utilize new service and repository layers, removing direct database calls.
- Enhanced user management with `UserService` for CRUD operations and user authentication.
- Revised architecture documentation to reflect the new service-repository pattern.
furyhawk