This commit implements the role-based access control middleware and adds auth routes with proper role checks for user, moderator, and admin roles as defined in the documentation.
This commit implements the role-based access control system as outlined in the project documentation. It includes:
- A requireRole middleware for protecting routes
- Auth routes for registration, login, profile management
- Audit logging for sensitive actions
- Role management endpoints
- Updated app.js to include audit logging middleware
