Build architecture-specific macOS wheels

[anth-volk]

Fixes #70

Summary

• add separate macOS wheel builds for Intel and Apple Silicon targets
• retag release wheels with explicit platform tags using wheel tags
• validate that the wheel filename, internal WHEEL metadata, and bundled Rust executable architecture agree before upload
• add unit coverage for the wheel artifact validator

Testing

• PYTHONPYCACHEPREFIX=/private/tmp/pycache-uk-rust PYTHONPATH=interfaces/python PYTEST_ADDOPTS='-p no:cacheprovider' python -m pytest interfaces/python/tests/test_validate_wheel_artifact.py -q
• PYTHONPYCACHEPREFIX=/private/tmp/pycache-uk-rust PYTHONPATH=interfaces/python PYTEST_ADDOPTS='-p no:cacheprovider' python -m pytest interfaces/python/tests -q
• python -c "import yaml; yaml.safe_load(open('.github/workflows/publish-pypi.yml'))"
• git diff --check

Notes

This adds release-time artifact validation but does not add a full PR wheel-build matrix. The existing PR workflow will run the validator unit tests through the Python wrapper test suite. A follow-up should decide whether to build and install smoke-test wheels on PRs, and whether Linux manylinux tags should be verified with auditwheel or retagged to match the build containers.