db: set total_weight to 0 if it does not exist

app/db.py

@@ -422,7 +422,7 @@ def update_order_info(
                             f"items: \n{items_table}"
                             f"currency: '{order['currency']}'\n"
                             f"subtotal: '{order['subtotal']}'\n"
-                            f"total_weight: '{order['total_weight']}'\n"
+                            f"total_weight: '{order.get('total_weight', 0)}'\n"
                             f"shipping: '{order['shipping']}'\n"
                             f"total: '{order['total']}'\n"
                             f"shipping_info: \n{shipping_info_table}"