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-middleware/test/unit/config.test.js

@@ -0,0 +1,33 @@
+/**
+ * GATE 2 (partial) — config exports.
+ */
+
+import { describe, it } from 'node:test';
+import assert from 'node:assert/strict';
+import { config, PLAN_LIMITS } from '../../src/config.js';
+
+describe('config', () => {
+  it('exposes required keys for HTTP and NATS', () => {
+    for (const key of [
+      'port',
+      'host',
+      'veraeApiBaseUrl',
+      'mockVerae',
+      'natsEnabled',
+      'natsUrl',
+      'tokenSecret',
+      'jobPollIntervalMs',
+      'jobPollMaxAttempts',
+      'storePath',
+    ]) {
+      assert.notEqual(config[key], undefined, `missing config.${key}`);
+    }
+  });
+
+  it('defines plan limits for free through enterprise', () => {
+    for (const plan of ['free', 'starter', 'pro', 'enterprise']) {
+      assert.ok(PLAN_LIMITS[plan], plan);
+      assert.equal(typeof PLAN_LIMITS[plan].requestsPerMinute, 'number');
+    }
+  });
+});