Fix cibuildwheel HTTP 429 rate limit error and ReadTheDocs build failure

[Copilot]

Fixes two CI build failures:

1. cibuildwheel HTTP 429 rate limit error

cibuildwheel v2.x downloads virtualenv via GitHub blob URLs, which are now hitting GitHub's unauthenticated rate limits (HTTP 429). This was fixed upstream in v3.1.4 (pypa/cibuildwheel#2555) by switching to release URLs.

• Upgrade pypa/cibuildwheel from v2.23.2 → v3.4.0
• Replace macos-12 with macos-13 in the build matrix — macos-12 runners are no longer available

2. ReadTheDocs build failure

The RTD build was failing because cmake and doxygen were not available in the build environment.

• Upgrade RTD OS from ubuntu-20.04 to ubuntu-22.04 (Ubuntu 20.04 reached EOL April 2025)
• Add cmake to apt_packages in .readthedocs.yaml — required by scikit-build-core to compile the C++ extensions
• Add doxygen to apt_packages in .readthedocs.yaml — required by conf.py to generate C++ API documentation XML for the Breathe Sphinx extension
• Replace deprecated pkg_resources with importlib.metadata in docs/conf.py

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[dfm]

@copilot please fix the readthedocs failure.

[Copilot]

@copilot please fix the readthedocs failure.

Fixed in 6a0d18a. The RTD build was failing because:

1. cmake was not available in the build environment — scikit-build-core needs it to compile the C++ extensions
2. doxygen was missing — conf.py runs subprocess.call("doxygen Doxyfile.in") but it wasn't in apt_packages

Changes:

• Upgraded RTD OS from ubuntu-20.04 → ubuntu-22.04 (20.04 reached EOL April 2025)
• Added cmake and doxygen to apt_packages in .readthedocs.yaml
• Replaced deprecated pkg_resources with importlib.metadata in docs/conf.py

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• app.readthedocs.org
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)
• blog.readthedocs.com
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)
• docs.readthedocs.io
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)
• gitlab.com
  • Triggering command: /usr/lib/git-core/git-remote-https /usr/lib/git-core/git-remote-https origin REDACTED (dns block)
• readthedocs.org
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)
  • Triggering command: /usr/bin/curl curl -s REDACTED (dns block)
  • Triggering command: /usr/bin/curl curl -sv REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)