取得股票定位
GET /broker/instruments/stock-locates/get
擷取股票賣空交易相關資訊，包括股票借入類型（ETB/HTB）、可用賣空數量、賣空利率等（僅供參考）。
Request
Unauthorized: Authentication required
A business logic error triggered when the request cannot be processed due to domain-specific constraints.