Rewrite store JSDoc, split quote/order into modules, and generate typed API docs

- Rewrite JSDoc across all store methods to document the actual async
  methods (real params, returns, throws) instead of the internal wrappers
- Split quote/order into individual module files backed by shared
  manifestDoc helpers; remove the createStore factory and thin wrappers
- Deduplicate manifest line helpers into src/store/manifestLines.js
- Extend generate-api-doc.js to render parameter/return/throws types and
  emit per-namespace API.<module>.md files with an API.md index
- Regenerate all API docs

API.pic.md

@@ -8,9 +8,25 @@ This document is auto-generated from the JSDoc comments in `src/store` by runnin
 
 Returns the full-size image (AVIF) for a given hash.
 
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `googleAuthId` | `number` | The id of the Google auth user. |
+| `fullHash` | `string` | The full image hash. |
+
+**Returns**
+
+`Promise<{buffer: Buffer, w: number, h: number, size: number, contentType: string}>` — The full image.
+
+**Throws**
+
+`Error` — If the image is not found.
+
+**Example**
+
 ```js
-const fn = getImageByHash(pool);
-const image = await fn(42, 'abc123');
+const image = await store.pic.getImageByHash(42, 'abc123');
 // => { buffer, w, h, size, contentType: 'image/avif' }
 ```
 
@@ -20,8 +36,24 @@ const image = await fn(42, 'abc123');
 
 Returns the thumbnail image (AVIF) for a given hash.
 
+**Parameters**
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `googleAuthId` | `number` | The id of the Google auth user. |
+| `fullHash` | `string` | The full image hash. |
+
+**Returns**
+
+`Promise<{buffer: Buffer, w: number, h: number, contentType: string}>` — The thumbnail image.
+
+**Throws**
+
+`Error` — If the image is not found.
+
+**Example**
+
 ```js
-const fn = getThumbByHash(pool);
-const thumb = await fn(42, 'abc123');
+const thumb = await store.pic.getThumbByHash(42, 'abc123');
 // => { buffer, w, h, contentType: 'image/avif' }
 ```