[Server] Implement Automatic File Cleanup

[Pushkarini579]

The server/uploads/ directory stores all uploaded retina scans. Implement a background task using node-cron or setInterval to automatically delete files older than 24 hours to prevent disk exhaustion.

[Suji2007hub]

assign me

[abhishekmanegit]

/assign

I’d like to work on this issue under GSSoC'26.