Fleet now spawns the real zappier and middleware processes. Metered
timestamp/receipt/hash calls proxy to middleware when ZAPPIER_UPSTREAM
is set. CS credits, sales per-customer pricing, and QuickBooks export
are separate repos plugged into zappier-edge admin.
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.
