协议变更(V1.02→V1.03): - 0x8A 响应: Ret(0x10/0x11) + Amount + Amount*(SensIn+SensOut) - 新增灵敏度响应例程 (7F 80 13 8A 10 04 ...) - 波特率确认 192000 代码修正: - lup_build_sensitivity_read: LEN=3 (was 4) - lup_build_sensitivity_write: LEN=3+Amount*4 (was 2+Amount*2) - lup_parse_sensitivity_resp: 解析 Ret 字节 + SensIn/SensOut 双值 - lup_build_set_param: LEN=3+5*Amount (was 2+5*Amount) - tcp_json_srv: JSON 输出含 sens_in/sens_out 字段