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.

packages/verae-fleet/services/customer-service.json

@@ -0,0 +1,22 @@
+{
+  "id": "customer-service",
+  "title": "Customer-service credits",
+  "kind": "http",
+  "package": "zappier-customer-service",
+  "role": "customer-service",
+  "managed": true,
+  "runtime": "HTTP :3011 CS credits → zappier-edge",
+  "health": { "type": "http", "path": "/health", "timeoutMs": 2000 },
+  "ports": { "healthBase": 3011 },
+  "spawn": {
+    "cwd": "../zappier-customer-service",
+    "command": "node",
+    "args": ["src/server.js"]
+  },
+  "env": {
+    "PORT": "3011",
+    "ZAPPIER_ADMIN_URL": "http://127.0.0.1:3000"
+  },
+  "nats": { "in": [], "out": [] },
+  "notes": "Department API. Prepaid balances live on zappier-edge."
+}