Wire zappier-edge into the live stack and add billing department APIs

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.

scripts/build-docs-site.py

@@ -71,6 +71,9 @@ SECTIONS = [
             ("packages/zappier/docs/CUSTOMER-PORTAL.md", "Signup, 2FA, API keys, reloads"),
             ("packages/zappier/docs/ACCOUNTING.md", "Invoices, PO billing, reports"),
             ("packages/zappier/docs/DEVELOPER.md", "Developer reference"),
+            ("packages/zappier-customer-service/README.md", "Customer-service credits API"),
+            ("packages/zappier-sales-pricing/README.md", "Sales per-customer pricing API"),
+            ("packages/zappier-accounting-export/README.md", "QuickBooks / accounting export"),
         ],
     ),
     (
@@ -323,6 +326,9 @@ def main() -> None:
         "verae-nats-process",
         "docs-master",
         "verae-ops",
+        "zappier-customer-service",
+        "zappier-sales-pricing",
+        "zappier-accounting-export",
     ):
         pkg_root = ROOT / "packages" / pkg
         if pkg in {"zapier-user-docs", "overview", "docs-master", "verae-ops"}:
@@ -481,6 +487,9 @@ def main() -> None:
         ("overview", "High-level system overview"),
         ("verae-nats-process", "Template for a new NATS address"),
         ("verae-ops", "Install, Docker, Proxmox, VMs, dedicated hardware"),
+        ("zappier-customer-service", "CS credits"),
+        ("zappier-sales-pricing", "Sales per-customer pricing"),
+        ("zappier-accounting-export", "QuickBooks export"),
     ]
     git_lis = "".join(
         f'<li><a href="https://git.georgelambert.org/marchon/{name}">{name}</a> '