Adds the same Old French etymology line ("The origin is Old French
harneis — gear, equipment, armor.") that was added to the canonical
best-practice deck, so the horse-harness analogy slide reads
identically across both decks. The line sits below the existing red
subtitle as a muted footnote (0.95rem, #666), with `text-align:
center` added for this deck because the GDG caption block relies on
flex centering rather than inherited text alignment.
Co-Authored-By: Claude <noreply@anthropic.com>
Shayan Rais
796b99f2a2