macos-13 runners are too scarce — the darwin-x64 leg sat queued for hours
and blocked the release publish job (which needs all build legs). Ship the
CLI Apple-Silicon-only for macOS; desktop macOS DMG/ZIP stays universal.
Removed from release.yml + test-release.yml matrices, updated ci-workflow
assertions (5→4 targets) and RELEASING.md.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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