fix json data pull from /raw

enrich_costco.py

@@ -213,9 +213,11 @@ def parse_costco_item(order_id, order_date, raw_path, line_no, item):
 
 def iter_costco_rows(raw_dir):
     for path in discover_json_files(raw_dir):
-        if path.name == "summary.json":
+        if path.name in {"summary.json", "summary_requests.json"}:
             continue
         payload = json.loads(path.read_text(encoding="utf-8"))
+        if not isinstance(payload, dict):
+            continue
         receipts = payload.get("data", {}).get("receiptsWithCounts", {}).get("receipts", [])
         for receipt in receipts:
             order_id = receipt["transactionBarcode"]