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.

packages/verae-zapier/creates/verify_timestamp.js

@@ -0,0 +1,36 @@
+const base = () => process.env.MIDDLEWARE_BASE_URL || 'http://127.0.0.1:3100';
+
+const perform = async (z, bundle) => {
+  const response = await z.request({
+    method: 'POST',
+    url: `${base()}/zapier/v1/verify`,
+    body: { certificate: bundle.inputData.certificate },
+  });
+  return response.data;
+};
+
+module.exports = {
+  key: 'verify_timestamp',
+  noun: 'Verification',
+  display: {
+    label: 'Verify Timestamp',
+    description: 'Verify a timestamp certificate.',
+  },
+  operation: {
+    inputFields: [
+      {
+        key: 'certificate',
+        label: 'Certificate',
+        type: 'text',
+        required: true,
+      },
+    ],
+    perform,
+    sample: { valid: true, timestamp: '2023-01-01T12:00:00Z', blockIndex: 42 },
+    outputFields: [
+      { key: 'valid', label: 'Valid', type: 'boolean' },
+      { key: 'timestamp', label: 'Timestamp', type: 'datetime' },
+      { key: 'blockIndex', label: 'Block Index', type: 'integer' },
+    ],
+  },
+};