chore: Upgrade Python requirements

[edx-requirements-bot]

Python requirements update. Please review the changelogs for the upgraded packages.

[edx-requirements-bot]

List of packages in the PR without any issue.

• cachetools changes from 7.1.7 to 7.1.8
• edx-drf-extensions changes from 10.7.0 to 10.8.0
• filelock changes from 3.32.4 to 3.32.5
• joblib changes from 1.5.3 to 1.6.0
• lxml changes from 6.1.2 to 6.1.3
• numpy changes from 2.5.2 to 2.5.3
• platformdirs changes from 4.11.5 to 4.11.7
• pymongo changes from 4.17.0 to 4.18.0
• regex changes from 2026.8.31 to 2026.9.3
• ruff changes from 0.16.5 to 0.16.6
• tox changes from 4.61.1 to 4.61.2
• uv changes from 0.12.7 to 0.12.10
• virtualenv changes from 21.7.7 to 21.7.8
• xblock changes from 6.3.1 to 6.3.3

[edx-requirements-bot]

These Packages need manual review..

• [NEW] cloudpickle (3.1.2) added to the requirements