Add NATS account-balance SoT and statement review for customers, CS, and sales

Internal billing now uses verae.billing.* request-reply and pubs. zappier-account-balance tracks prepaid, credits, usage, and payments. Portal, admin, CS, and sales all review the same statement. Independent Forgejo repos stay split via push-module-repos.

packages/zappier/package-lock.json

@@ -13,6 +13,7 @@
         "dotenv": "^17.4.2",
         "express": "^4.19.2",
         "express-openapi-validator": "^5.3.0",
+        "nats": "^2.29.3",
         "qrcode": "^1.5.4",
         "stripe": "^16.0.0",
         "swagger-ui-express": "^5.0.0",
@@ -4397,6 +4398,19 @@
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       "license": "MIT"
     },
+    "node_modules/nats": {
+      "version": "2.29.3",
+      "resolved": "https://registry.npmjs.org/nats/-/nats-2.29.3.tgz",
+      "integrity": "sha512-tOQCRCwC74DgBTk4pWZ9V45sk4d7peoE2njVprMRCBXrhJ5q5cYM7i6W+Uvw2qUrcfOSnuisrX7bEx3b3Wx4QA==",
+      "deprecated": "Package moved. Use @nats-io/transport-node from https://github.com/nats-io/nats.js",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "nkeys.js": "1.1.0"
+      },
+      "engines": {
+        "node": ">= 14.0.0"
+      }
+    },
     "node_modules/natural-compare": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/natural-compare/-/natural-compare-1.4.0.tgz",
@@ -4420,6 +4434,18 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/nkeys.js": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/nkeys.js/-/nkeys.js-1.1.0.tgz",
+      "integrity": "sha512-tB/a0shZL5UZWSwsoeyqfTszONTt4k2YS0tuQioMOD180+MbombYVgzDUYHlx+gejYK6rgf08n/2Df99WY0Sxg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "tweetnacl": "1.0.3"
+      },
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
     "node_modules/node-abi": {
       "version": "3.94.0",
       "resolved": "https://registry.npmjs.org/node-abi/-/node-abi-3.94.0.tgz",
@@ -5821,6 +5847,12 @@
         "node": "*"
       }
     },
+    "node_modules/tweetnacl": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-1.0.3.tgz",
+      "integrity": "sha512-6rt+RN7aOi1nGMyC4Xa5DdYiukl2UWCbcJft7YhxReBGQD7OAM8Pbxw6YMo4r2diNEA8FEmu32YOn9rhaiE5yw==",
+      "license": "Unlicense"
+    },
     "node_modules/type-detect": {
       "version": "4.0.8",
       "resolved": "https://registry.npmjs.org/type-detect/-/type-detect-4.0.8.tgz",