chore(ci): inline PyPI publishing workflows to resolve attestation issues

[markurtz]

Description

This PR refactors the project's PyPI publishing configuration to resolve issues with GitHub artifact attestations. The nested _publish.yml reusable workflow was removed, and the actions/attest-build-provenance, pypa/gh-action-pypi-publish, and GitHub Release creation steps were directly integrated into the nightly.yml and release.yml workflows. This structural change removes the nested job dependency, ensuring that the provenance action can correctly identify and verify the built artifacts without identity mismatches.

Additionally, workflow titles and internal file descriptions across the .github/workflows directory have been simplified for better readability (e.g., from "CI — Nightly Deep Dive" to "CI — Nightly").

Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📝 Documentation update (changes to README.md, SUPPORT.md, docstrings, etc.)
• 🛠️ Maintenance/Refactoring (non-breaking change that improves code structure or quality)

Test Plan

These changes strictly impact the GitHub Actions infrastructure. Verification will rely on observing the completion of the modified workflows in the target repository, specifically verifying that the actions/attest-build-provenance step in nightly.yml and release.yml executes successfully without identity errors during publishing.

Related Issues

• Fixes #

Screenshots / Visuals (if applicable)

N/A

Use of AI

• Includes AI-assisted code completion
• Includes code generated by an AI application
• Includes AI-generated tests (NOTE: AI written tests should have a docstring that includes ## WRITTEN BY AI ##)

Checklist

Important

Please review and complete this checklist before submitting your PR. This helps our maintainers process your contribution faster and ensures it meets the quality standards of gitversioned.

• "I certify that all code in this PR is my own, except as noted below."
• I have read the CONTRIBUTING.md guide.
• My code follows the established style guidelines of gitversioned.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings or errors.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.

[github-actions]

CI Development Pipeline Status

✅ Pipeline: Completed successfully. View Run Details