upgraded pytest from 8 to 9

[KapilDuwadi]

📌 Summary

Closes #[issue_number] (if applicable)

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✅ Checklist

Please check all that apply:

• I have linked to an existing issue or opened a new one (if applicable)
• I have written or updated relevant tests
• I have updated documentation where applicable
• I have ensured the code is formatted and tested
• I have manually verified that the changes work as expected

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🧪 How to Test This

1. Run pytest from project root.

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📝 Additional Notes

• This PR adds ...
• Known limitations:
  • ...