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/AuthenticationSessionConfigSchema.js

@@ -0,0 +1,31 @@
+'use strict';
+
+const makeSchema = require('../utils/makeSchema');
+
+const RequestSchema = require('./RequestSchema');
+const FunctionSchema = require('./FunctionSchema');
+
+module.exports = makeSchema(
+  {
+    id: '/AuthenticationSessionConfigSchema',
+    description: 'Config for session authentication.',
+    type: 'object',
+    required: ['perform'],
+    properties: {
+      perform: {
+        description:
+          'Define how Zapier fetches the additional authData needed to make API calls.',
+        oneOf: [{ $ref: RequestSchema.id }, { $ref: FunctionSchema.id }],
+      },
+    },
+    additionalProperties: false,
+    examples: [{ perform: { require: 'some/path/to/file.js' } }],
+    antiExamples: [
+      {
+        example: {},
+        reason: 'Missing required key: perform',
+      },
+    ],
+  },
+  [FunctionSchema, RequestSchema],
+);