chore: upgrade to django 5.2

[navinkarkera]

Fixes: #109

Add Django 5.2 Support

This PR updates the codebase to be compatible with Django 5.2 while maintaining compatibility with Django 4.2.

Changes Made:

• Ran django-upgrade to apply necessary syntax updates for Django 5.2
• Ensured all modifications remain backward-compatible with Django 4.2.

Concerns:

This repo doesn't use any django features and hence has no tests/tox for django.

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[awais786]

@feanil please merge this.