[WIP] Fix failing GitHub Actions job for Python 3.13

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Fix the failing GitHub Actions job "Test (Python 3.13 on macos-latest)"
Analyze the Actions logs, identify the root cause of the failure, and implement a fix.
Check run ID: 101874946691
Job URL: https://github.com/microsoft-foundry/Model-Router-Auto-Evaluation/actions/runs/34165265385/job/101874946691