PDFs rewrite in-document .md/.html links to sibling PDFs. Catalog
start page is GETTING-STARTED (install, first-up, monitor). Billing
and user platform is zappier-edge (original ~/zappier tree).
Add missing package READMEs, expand Sphinx to all runtime modules,
publish a LaTeX/PDF README book, and add verae-ops for Docker,
Proxmox, VMs, dedicated hardware, and service linking. Catalog
defaults to public PDF links for each module README and samples.
