券商 API訂單 訂單查詢 列出掛單中訂單列出掛單中訂單 GET /broker/orders/open-orders/list 擷取當前掛單中的訂單清單，支援分頁。 Request Responses200401417500OKUnauthorized: Authentication requiredA business logic error triggered when the request cannot be processed due to domain-specific constraints.Internal Server Error.