Function backend_order_status_to_ftapi 

pub fn backend_order_status_to_ftapi(status: u32) -> i32

Backend odr_sys_cmn::OrderStatus -> FTAPI Trd_Common::OrderStatus.

Ref: FutuOpenD/Src/NNProtoCenter/Trade/_NNProto_Trd_Comm.cpp Trd_OrderStatusConv_S2C.