Feature Request: Implement Username system for users

🚀 Feature Request

Is your feature request related to a problem? Please describe.

Yes this feature request is for implementing usernames for all users as right now the user id is being displayed public hence security concerns.

Describe the solution you'd like

Implementation of usernames for all users and the required endpoints for fetching users through usernames not only user id.

Also please refactor the get /record/{record-id} endpoint to join the record with user and also return username along with the get record.

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

Additional context

search by name in user profile which is not ideal.

📌 Follow semantic issue titling convention: <type>(<scope>): <description> (e.g., feat(records): support video uploads or feat(auth): implement password reset).