The Dagger build_docs pipeline cloned Quartz from the default branch
unpinned. Quartz v5.0.0 restructured its config layout (.quartz/plugins,
../quartz imports), breaking the docs build against our existing
quartz.config.ts / quartz.layout.ts. Pin the clone to the last v4
release (v4.5.2) to restore known-good behavior.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
