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/src/debug/index.js

@@ -0,0 +1,24 @@
+/**
+ * @fileoverview Public exports for the runtime debug facility.
+ * @module debug
+ */
+
+export {
+  loadDebugConfig,
+  parseDebugVeraeEnv,
+  parseLevel,
+  shouldLog,
+  LEVEL_ORDER,
+} from './config.js';
+
+export { createDebugger, formatLogLine, setDebugTestSink } from './logger.js';
+
+export { redact, redactString } from './redact.js';
+
+export {
+  generateTraceId,
+  getTraceId,
+  getTraceContext,
+  withTrace,
+  traceMiddleware,
+} from './trace.js';