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/BufferConfigSchema.js

@@ -0,0 +1,48 @@
+'use strict';
+
+const makeSchema = require('../utils/makeSchema');
+
+module.exports = makeSchema({
+  id: '/BufferConfigSchema',
+  description:
+    'Currently an **internal-only** feature. Zapier uses this configuration for creating objects in bulk.',
+  type: 'object',
+  required: ['groupedBy', 'limit'],
+  properties: {
+    groupedBy: {
+      description:
+        'The list of keys of input fields to group bulk-create with. The actual user data provided for the fields will be used during execution. Note that a required input field should be referenced to get user data always.',
+      type: 'array',
+      minItems: 1,
+    },
+    limit: {
+      description:
+        "The maximum number of items to call `performBuffer` with. **Note** that it is capped by the platform to prevent exceeding the [AWS Lambda's request/response payload size quota of 6 MB](https://docs.aws.amazon.com/lambda/latest/dg/gettingstarted-limits.html#function-configuration-deployment-and-execution). Also, the execution is time-bound; we recommend reducing it upon consistent timeout.",
+      type: 'integer',
+    },
+  },
+  examples: [
+    {
+      groupedBy: ['workspace', 'sheet'],
+      limit: 100,
+    },
+  ],
+  antiExamples: [
+    {
+      example: {
+        groupedBy: [],
+        limit: 100,
+      },
+      reason: 'Empty groupedBy list provided: `[]`.',
+    },
+    {
+      example: { groupedBy: ['workspace'] },
+      reason: 'Missing required key: `limit`.',
+    },
+    {
+      example: { limit: 1 },
+      reason: 'Missing required key: `groupedBy`.',
+    },
+  ],
+  additionalProperties: false,
+});