Fix timezone deprecation warnings

[redreceipt]

Summary

• use timezone-aware datetime in jobs.py to avoid DeprecationWarning

Testing

• flake8 *.py
• mypy .

---

https://chatgpt.com/codex/tasks/task_e_688c0df7e140832493daa0fa44dae5d3

[Copilot]

Pull Request Overview

This PR addresses timezone deprecation warnings by replacing the deprecated datetime.utcnow() method with the recommended datetime.now(timezone.utc) approach. The change ensures timezone-aware datetime handling while maintaining the same UTC functionality.

• Updated import statement to include timezone from the datetime module
• Replaced two instances of datetime.utcnow().date() with datetime.now(timezone.utc).date()