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/sphinx/modules/verae-zapier-middleware/debug/config.md

@@ -0,0 +1,43 @@
+# `verae-zapier-middleware/debug/config`
+
+**Package:** `verae-zapier-middleware`  
+**Source:** `packages/verae-zapier-middleware/src/debug/config.js`  
+**Lines:** 107
+
+## What this module is
+
+Implementation module in `verae-zapier-middleware`. The tables below are extracted from the source (signatures + JSDoc).
+
+## Exports
+
+`parseDebugVeraeEnv`, `parseLevel`, `loadDebugConfig`, `shouldLog`
+
+## Types / interfaces / classes
+
+_None extracted._
+
+## Functions
+
+| Name | Parameters | Param types (JSDoc) | Returns | Calls (same file / helpers) |
+|------|------------|---------------------|---------|-----------------------------|
+| `parseDebugVeraeEnv` | `raw` | raw: `string|undefined` | `{ enabled: boolean, namespaces: Set<string>|null ` — } | see Call graph |
+| `parseLevel` | `raw, fallback = 'debug'` | raw: `string|undefined`, fallback: `'debug'|'info'|'warn'|'error'` | `'debug'|'info'|'warn'|'error'` | see Call graph |
+| `loadDebugConfig` | `env = process.env` | env: `NodeJS.ProcessEnv` | `DebugConfig` | see Call graph |
+| `shouldLog` | `config, namespace, messageLevel` | config: `DebugConfig`, namespace: `string`, messageLevel: `'debug'|'info'|'warn'|'error'` | `boolean` | see Call graph |
+
+## What it imports / requires
+
+_No imports detected._
+
+## Call graph (identifiers invoked)
+
+`value`, `parseDebugVeraeEnv`, `trim`, `toLowerCase`, `split`, `map`, `filter`, `parseLevel`, `namespaces`, `loadDebugConfig`, `namespace`, `shouldLog`, `has`
+
+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`.
+