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

src/store/article/getBySku.js

@@ -6,19 +6,20 @@ function parseJsonArray(raw) {
   return Array.isArray(arr) ? arr : [];
 }
 
-/**
- * Returns the full detail of an article by its SKU, including unit, brand,
- * categories, photos, EANs and prices.
- *
- * @param {object} pool - The mssql connection pool.
- * @returns {Function} An async function that fetches an article by SKU.
- *
- * @example
- * const fn = getBySku(pool);
- * const article = await fn(42, 'SKU-1');
- * // => { article: { id, sku, name, unit, brand, categoryIds, photos, eans, prices, ... } }
- */
 export default function getBySku(pool) {
+  /**
+   * Returns the full detail of an article by its SKU, including unit, brand,
+   * categories, photos, EANs and prices.
+   *
+   * @param {number} googleAuthId - The id of the Google auth user.
+   * @param {string} sku - The article SKU.
+   * @returns {Promise<{article: object}>} The full article detail.
+   * @throws {Error} If the article is not found or the user is not authorized.
+   *
+   * @example
+   * const article = await store.article.getBySku(42, 'SKU-1');
+   * // => { article: { id, sku, name, unit, brand, categoryIds, photos, eans, prices, ... } }
+   */
   return async (googleAuthId, sku) => {
     const t0 = performance.now();
     const result = await pool