Bind each customer to a Verae userId for hop tracing

Signup registers/binds a Verae central user and stores veraeUserId. Public access stays the zappier API key. Chain JWTs stay server-side behind tokenRef. Authz, billing, and jobs.watch carry veraeUserId.

docs/modules/zappier/verae-bind.md

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+# `zappier/verae-bind`
+
+**Package:** `zappier`  
+**Source:** `packages/zappier/src/verae-bind.ts`  
+**Lines:** 77
+
+## What this module is
+
+Implementation module in `zappier`. The tables below are extracted from the source (signatures + JSDoc).
+
+## Exports
+
+`normalizeVeraeUsername`, `stableVeraeUserId`, `VeraeBind`, `bindVeraeUser`
+
+## Types / interfaces / classes
+
+| Kind | Name |
+|------|------|
+| type | `VeraeBind` |
+
+## Functions
+
+| Name | Parameters | Param types (JSDoc) | Returns | Calls (same file / helpers) |
+|------|------------|---------------------|---------|-----------------------------|
+| `normalizeVeraeUsername` | `username: string` | — | `unknown` | see Call graph |
+| `stableVeraeUserId` | `username: string` | — | `unknown` | see Call graph |
+| `mockBind` | `email: string` | — | `unknown` | see Call graph |
+| `bindVeraeUser` | `email: string` | — | `unknown` | see Call graph |
+| `login` | `username: string, pass: string` | — | `unknown` | see Call graph |
+
+## What it imports / requires
+
+- `crypto`
+
+## Call graph (identifiers invoked)
+
+`normalizeVeraeUsername`, `trim`, `toLowerCase`, `stableVeraeUserId`, `createHash`, `update`, `digest`, `slice`, `mockBind`, `bindVeraeUser`, `replace`, `randomBytes`, `toString`, `async`, `fetch`, `stringify`, `json`, `login`
+
+Each identifier is a call site in this file. Follow the import list to see the defining module; open that module’s MD for parameter and return types.
+
+## Return values (how to read this)
+
+- HTTP route handlers return Express `res.json(...)` bodies (see route docs).
+- Zapier `perform` functions return a **single object** (creates) or an **array** (triggers/searches).
+- Pricing functions return integer **cents** on `Quote.totalCents`.
+