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/legacy-scripting-runner/test/example-app/session-auth.js

@@ -0,0 +1,47 @@
+'use strict';
+
+const testAuthSource = `
+  return z.legacyScripting.run(bundle, 'trigger', 'contact_full');
+`;
+
+const getSessionKeySource = `
+  return z.legacyScripting.run(bundle, 'auth.session');
+`;
+
+const getConnectionLabelSource = `
+  return z.legacyScripting.run(bundle, 'auth.connectionLabel');
+`;
+
+module.exports = {
+  legacy: {
+    authentication: {
+      mapping: {
+        'X-Api-Key': '{{key1}}{{key2}}',
+      },
+      placement: 'header',
+    },
+    testTrigger: 'contact_full',
+  },
+  authentication: {
+    type: 'session',
+    test: { source: testAuthSource },
+    fields: [
+      {
+        key: 'username',
+        label: 'Username',
+        type: 'string',
+        required: true,
+      },
+      {
+        key: 'password',
+        label: 'Password',
+        type: 'password',
+        required: true,
+      },
+    ],
+    sessionConfig: {
+      perform: { source: getSessionKeySource },
+    },
+    connectionLabel: { source: getConnectionLabelSource },
+  },
+};