fix: update jaraco.context to resolve CVE

[qued]

Summary

GHSA-58pv-8j8x-9vj2 involves the Python package jaraco.context, which is past of the base Python toolchain (as opposed to unstructured-specific deps). This PR pulls in the fix

Test instructions

Grype scan should not show GHSA-58pv-8j8x-9vj2.

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Note

Addresses security advisory GHSA-58pv-8j8x-9vj2 by removing vulnerable Python tooling from Docker images.

• Uninstalls setuptools and purges pip cache in dockerfiles/wolfi-base/Dockerfile and dockerfiles/wolfi-py3.12-slim/Dockerfile
• In wolfi-base, temporarily elevates to root for the uninstall, then restores the non-root user

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