Applies the same fix as test/lint to every workflow that still used
actions/setup-python, which the old act_runner engine mishandles:
- update-badges: was broken identically to lint — setup-python + pip
install hit the image's externally-managed system Python. Drop
setup-python, install with --break-system-packages, and use `python3`
(not bare `python`) for the coverage steps.
- canaries, prd-number: no pip install, so not failing, but they carried
the same fragile (and network-heavy) setup-python for stdlib-only work.
Removed — the image's system Python 3.12 runs them directly.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UoEZHDjv84ChoZbozQERhJ
didericis
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