Milestone 2: module/model docs (MD, Sphinx RST, PDF) and work log

74 source modules documented with extracted signatures, JSDoc params,
imports, and call graphs. 10 first-class models (PriceRule through
StatusResponse) have their own MD/RST/PDF. Sphinx HTML builds from
docs/sphinx. Per-module PDFs in docs/modules-pdf and docs/models-pdf.

Middleware gates 2–6 and 10 pass on MOCK_VERAE without NATS.

Learned: RST includes are relative to the RST file; keep one PDF per
module; Add Numbers remains the only push required tomorrow.

docs/modules/verae-zapier-middleware/services/tenantService.md

@@ -0,0 +1,57 @@
+# `verae-zapier-middleware/services/tenantService`
+
+**Package:** `verae-zapier-middleware`  
+**Source:** `packages/verae-zapier-middleware/src/services/tenantService.js`  
+**Lines:** 138
+
+## What this module is
+
+Implementation module in `verae-zapier-middleware`. The tables below are extracted from the source (signatures + JSDoc).
+
+## Exports
+
+`selfServeSignup`, `provisionTenant`, `listProvisionedTenants`
+
+## Types / interfaces / classes
+
+_None extracted._
+
+## Functions
+
+| Name | Parameters | Param types (JSDoc) | Returns | Calls (same file / helpers) |
+|------|------------|---------------------|---------|-----------------------------|
+| `slugify` | `value` | — | `unknown` | see Call graph |
+| `validateVeraeCredentials` | `username, password` | — | `unknown` | see Call graph |
+| `selfServeSignup` | `{ email, name, veraeUsername, veraePassword }` | — | `unknown` | see Call graph |
+| `provisionTenant` | `{
+  id,
+  name,
+  plan,
+  veraeUsername,
+  veraePassword,
+  contract = null,
+  metadata = {},
+  audience = 'admin',
+}` | — | `unknown` | see Call graph |
+| `listProvisionedTenants` | `(none)` | — | `Array<object>` | see Call graph |
+
+## What it imports / requires
+
+- `node:crypto`
+- `../store/tenants.js`
+- `../clients/veraeClient.js`
+- `../errors.js`
+- `../debug/logger.js`
+
+## Call graph (identifiers invoked)
+
+`createDebugger`, `slugify`, `toLowerCase`, `replace`, `slice`, `validateVeraeCredentials`, `login`, `selfServeSignup`, `randomUUID`, `createTenant`, `info`, `provision`, `provisionTenant`, `has`, `getTenant`, `listProvisionedTenants`, `listTenants`, `map`
+
+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`.
+