Refactor: prompt optimization to prefer Traditional Chinese for supplier names

incoming_goods_engine.py

@@ -565,6 +565,7 @@ def parse_ocr_chunks(chunks, accounting_db, location):
        - Every single field in the JSON (supplierName, materialName, etc.) MUST be in **TRADITIONAL CHINESE (繁體中文)**.
     2. **SUPPLIER IDENTIFICATION**:
        - The "supplierName" must be the clean COMPANY NAME. Strip out document type descriptors like "發貨單", "Invoice", etc.
+       - **IMPORTANT**: Try your best to identify the supplier's official name in **Traditional Chinese**.
     3. **DATE**:
        - Identify the "Order Date". Format: `YYYY-MM-DD`.
     4. **LOCATION**: "receiveLocation" MUST be exactly "{location}".