Function build_subscribe_req_with_options 

pub fn build_subscribe_req_with_options(
    securities: &[SecuritySubscribeInput],
) -> SubscribeSetReq

v1.4.106 codex 1131 F6: 构建带 SubBitOptions 的订阅请求 — 真传 session / detail / extended_time 给 backend.

v1.4.110 Phase 2 Slice 4: 升 3-tuple (stock_id, broker_id, sub_types) 让 SecuritySubscribe.broker_id 真写出去 (对齐 C++ MktQotSub.cpp:454-463):

SecuritySubscribe::set_security_id(stSecKey.nStockID);
if (stSecKey.HasBroker()) {
    SecuritySubscribe::set_broker_id(stSecKey.GetBrokerID());
}

• broker_id = None ⟺ C++ m_hasBroker = false, 不调 set_broker_id
• broker_id = Some(N) ⟺ C++ m_hasBroker = true, 写 broker_id = N