Refactor Request Controller and Model Functions for Additional Request Types

[sahsisunny]

Issue Description

Refactor request controller and model functions to add more request types, such as extension requests and task creation requests in the future.

Expected Behavior

After the refactoring, the request controller and model functions should be structured to handle additional request types seamlessly.

Current Behavior

Currently, the request controller and model functions are not designed to accommodate new request types beyond the existing functionality.

Screenshots

Reproducibility

• [ ] This issue is reproducible
• [x] This issue is not reproducible

Steps to Reproduce

N/A (As this is a refactoring task, there are no specific steps to reproduce.)

Severity/Priority

• [ ] Critical
• [x] High
• [ ] Medium
• [ ] Low

Additional Information

Checklist

• [x] I have read and followed the project's code of conduct.
• [x] I have searched for similar issues before creating this one.
• [x] I have provided all the necessary information to understand and reproduce the issue.
• [x] I am willing to contribute to the resolution of this issue.