Update app.py

app.py

@@ -37,16 +37,16 @@ Extract and structure the data as valid JSON only (no markdown, no commentary):
   "inventories": {
     "items": [
       {
-        "quantityShipped": "Quantity as number, no of packages",
+        "quantityShipped": number | null,
         "inventoryUnits": string | null,
         "pcs": number | null,
         "productName": string | null,
         "productCode": string | null,
         "product": {
-          "category": "Product category (OSB/Lumber/etc)",
+          "category": number | null,
           "defaultUnits": string | null,
-          "unit": "Unit type from document (MBF, FBM, SF, UNIT etc.)",
-          "pcs": "pcs": "Pieces per unit",
+          "unit": string | null,
+          "pcs": number | null,
           "mbf": number | null,
           "sf": number | null,
           "pcsHeight": number | null,