Fix - Missing rate limiting

[BoshithaMGunarathna]

Tracking issue for:

• https://github.com/SLIIT-24-25J-047-Research/INTERVIEW-PROCESSING-SYSTEM/security/code-scanning/7

HTTP request handlers should not perform expensive operations such as accessing the file system, executing an operating system command or interacting with a database without limiting the rate at which requests are accepted. Otherwise, the application becomes vulnerable to denial-of-service attacks where an attacker can cause the application to crash or become unresponsive by issuing a large number of requests at the same time. @IT21158186