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/example-apps/onedrive/constants.js

@@ -0,0 +1,12 @@
+'use strict';
+
+const BASE_ITEM_URL = 'https://graph.microsoft.com/v1.0';
+
+const BIG_FILE_MSG = 'File contents too big.';
+const BINARY_CONTENT_MSG = 'Binary contents unsupported.';
+
+module.exports = {
+  BASE_ITEM_URL,
+  BIG_FILE_MSG,
+  BINARY_CONTENT_MSG,
+};