Implement User-based Session Isolation with Authentication and Authorization

[mudassaralichouhan]

Enhance the session management system to support

• User-based session isolation with authentication and user-specific session management.

Each crawl session should be tied to a specific user and access-controlled based on roles.

Motivation:

• Ensure session data is isolated per user.
• Support multiple users safely on the same system.
• Enable role-based access for administrative and regular users.

Acceptance Criteria:

• Users can register and log in (JWT-based authentication).
• Each CrawlSession is linked to a userID.
• Only the session owner (or admin) can access session data.
• Role-based access control is enforced (admin, user).

Suggested Tasks:

1. Add User model and authentication system.
2. Extend CrawlSession to include userID.
3. Modify CrawlerManager to enforce user session isolation.
4. Update API endpoints to validate user permissions.
5. Write unit and integration tests for user session isolation.