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/JsonSchemaSchema.js

@@ -0,0 +1,47 @@
+'use strict';
+
+const makeSchema = require('../utils/makeSchema');
+
+module.exports = makeSchema({
+  id: '/JsonSchemaSchema',
+  description:
+    'A JSON Schema object that describes the expected structure of a JSON value. Validated against JSON Schema Draft 4, 6, or 7 meta-schema (based on the `$schema` field, defaulting to Draft 7) via the validateJsonFieldSchema functional constraint.',
+  type: 'object',
+  additionalProperties: true,
+  examples: [
+    { type: 'object', properties: { name: { type: 'string' } } },
+    { type: 'array', items: { type: 'string' } },
+    {},
+    {
+      allOf: [{ type: 'object' }, { properties: { name: { type: 'string' } } }],
+      not: { type: 'array' },
+    },
+    {
+      type: 'object',
+      properties: {
+        name: { type: 'string' },
+        age: { type: 'integer' },
+      },
+      required: ['name'],
+      additionalProperties: false,
+    },
+    {
+      $schema: 'http://json-schema.org/draft-07/schema#',
+      type: 'object',
+      properties: {
+        name: { type: 'string' },
+      },
+    },
+  ],
+  antiExamples: [
+    {
+      example: ['not', 'an', 'object'],
+      reason: 'JSON Schema must be an object, not an array',
+    },
+    {
+      example: { type: 'string' },
+      reason:
+        "JSON Schema type should be an object or an array. If a primitive is needed, use `type: 'string'` on the input field directly",
+    },
+  ],
+});