fix: nightly security dependency updates

[github-actions]

Security Update

This is an automated PR triggered by the nightly Trivy security scan.

The following dependencies were updated to resolve vulnerabilities with a CVSS score of 7.0 or higher:

Package & Version	Advisory Link
urllib3==2.6.3	https://avd.aquasec.com/nvd/cve-2026-21441

Verification: Attempted uv lock --upgrade-package. If blocked by parent constraints, the package was moved to override-dependencies in pyproject.toml to ensure the fix persists.

[google-oss-prow]

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[Fiona-Waters]

This PR can be closed as this dependency was updated in #296