Milestone 0: import zappier billing, Verae middleware, and Zapier research

Compose-ready workspace: packages/zappier (rate card, portal, Stripe),
packages/verae-zapier-middleware (timestamp + NATS), packages/verae-zapier
(CLI app), vendor/zapier-platform, and research/zapier vendor corpus.

Gate 0 structure checks pass. Product code and research are not yet wired.

vendor/zapier-platform/packages/schema/lib/schemas/FlatObjectSchema.js

@@ -0,0 +1,45 @@
+'use strict';
+
+const makeSchema = require('../utils/makeSchema');
+
+module.exports = makeSchema({
+  id: '/FlatObjectSchema',
+  description: 'An object whose values can only be primitives',
+  type: 'object',
+  patternProperties: {
+    '[^\\s]+': {
+      description:
+        'Any key may exist in this flat object as long as its values are simple.',
+      anyOf: [
+        { type: 'null' },
+        { type: 'string' },
+        { type: 'integer' },
+        { type: 'number' },
+        { type: 'boolean' },
+      ],
+    },
+  },
+  examples: [
+    { a: 1, b: 2, c: 3 },
+    { a: 1.2, b: 2.2, c: 3.3 },
+    { a: 'a', b: 'b', c: 'c' },
+    { a: true, b: true, c: false },
+    { a: 'a', b: 2, c: 3.1, d: true, e: false },
+    { 123: 'hello' },
+  ],
+  antiExamples: [
+    {
+      example: { a: {}, b: 2 },
+      reason: 'Invalid value for key: a (objects are not allowed)',
+    },
+    {
+      example: { a: [], b: 2 },
+      reason: 'Invalid value for key: a (arrays are not allowed)',
+    },
+    {
+      example: { '': 1 },
+      reason: 'Key cannot be empty',
+    },
+  ],
+  additionalProperties: false,
+});