feat(naddod-scraper): extract per-warehouse stock breakdown + write warehouse_global_qty

Adds parseWarehouseStock() to decode the HTML-entity-encoded warehouse_stock JSON
(us/nl/sg/cn per-region array). When the static page has warehouse data, writes:
  warehouse_de_qty   ← nl (EU-closest warehouse)
  warehouse_global_qty ← sum(us+nl+sg+cn), or falls back to quantity_available
  stock_confidence   ← 3 (L3) when warehouse breakdown available, else 2

Note: per-warehouse quantities require JS execution to populate (API-loaded);
static HTML has [0,0] placeholders. The fallback ensures NADDOD global totals
appear in the competitor-by-tech dashboard comparison.

packages/scraper/src/scrapers/naddod.ts

@@ -193,6 +193,45 @@ function parseStockText(html: string): { qty?: number; confidence: 1 | 2 } | nul
   return { confidence: 1 }; // fallback: boolean
 }
 
+
+/**
+ * Parse per-warehouse stock breakdown from NADDOD HTML.
+ * The data lives as HTML-entity-encoded JSON in a hydration payload:
+ *   "warehouse_stock":[0,{"us":[0,543],"nl":[0,211],"sg":[0,0],"cn":[0,0]}]
+ * Format per region: [signalBit, quantity]
+ * Mapping: us → US, nl → NL/EU (closest to DE), sg → APAC, cn → CN
+ * We use nl as DE-equivalent (EU warehouse) and sum all for global.
+ */
+function parseWarehouseStock(html: string): {
+  eu: number | null;   // nl warehouse → DE-equivalent
+  global: number | null; // us+nl+sg+cn total
+} | null {
+  // Strip HTML entities so we can JSON.parse
+  const decoded = html
+    .replace(/"/g, '"')
+    .replace(/&/g, '&')
+    .replace(/'/g, "'");
+
+  const m = decoded.match(/"warehouse_stock":\[0,(\{[^}]+\})\]/);
+  if (!m) return null;
+
+  try {
+    const ws = JSON.parse(m[1]) as Record<string, unknown>;
+    function qty(key: string): number {
+      const v = ws[key];
+      if (Array.isArray(v) && v.length >= 2 && typeof v[1] === 'number') return Math.max(0, v[1]);
+      return 0;
+    }
+    const us = qty('us'), nl = qty('nl'), sg = qty('sg'), cn = qty('cn');
+    const total = us + nl + sg + cn;
+    // Only return data if at least one warehouse has stock
+    if (total === 0 && nl === 0) return null; // no warehouse breakdown available
+    return { eu: nl, global: total };
+  } catch {
+    return null;
+  }
+}
+
 // ── HTTP helpers ────────────────────────────────────────────────────────────
 
 async function fetchText(url: string): Promise<string> {
@@ -458,16 +497,20 @@ export async function scrapeNaddod(): Promise<void> {
         if (isNew) priceUpdates++;
       }
 
-      // Stock observation
+      // Stock observation — enhanced with per-warehouse breakdown
       if (stock !== null) {
         const stockLevel = stock.qty !== undefined ? (stock.qty > 0 ? "in_stock" : "out_of_stock") : "in_stock";
+        const warehouseData = parseWarehouseStock(html);
         const isNew = await upsertStockObservation({
           transceiverId: txId,
           sourceVendorId: vendorId,
           stockLevel,
           quantityAvailable: stock.qty !== undefined && stock.qty > 0 ? stock.qty : undefined,
+          // NL warehouse ≈ EU/DE equivalent; sum of all warehouses = global
+          warehouseDeQty: warehouseData?.eu ?? undefined,
+          warehouseGlobalQty: warehouseData?.global ?? (stock.qty !== undefined && stock.qty > 0 ? stock.qty : undefined),
           productUrl: url,
-          stockConfidence: stock.confidence,
+          stockConfidence: warehouseData ? 3 : stock.confidence, // L3 when per-warehouse available
           priceCurrency: "USD",
           priceIncludesTax: false,
         });