CR-2026-03-23: Antora.yml Enhancements — Rollback

Rollback Procedure

All changes are additive (new attributes, new functions). Rollback by reverting the antora.yml and .zshrc changes:

# Revert antora.yml
git -C ~/atelier/_bibliotheca/domus-captures restore docs/antora.yml

# Remove shell functions (if needed)
# Edit ~/.zshrc and remove days_since/days_until functions

# Verify build still clean
cd ~/atelier/_bibliotheca/domus-captures
make 2>&1 | grep -E "WARN|ERROR"

No existing functionality is modified, so rollback risk is minimal.