Function build_check_ctxs 

pub fn build_check_ctxs(proto_id: u32, body: &[u8]) -> Vec<CheckCtx>

DEPRECATED in pipeline path — 旧 API, 仍保留供 4 surface 调用方未迁移 代码用 (e.g. futu-server::body_aware_acc_id re-export). 新代码请用 [extract_coverage] match variant.

行为对齐 v1.4.105: decode 失败返空 Vec (放行让下游报错). pipeline path 不 再调本函数, 直接 [extract_coverage] match variant.