cadc59e6dc
- xt_gateway: _open_session抽离, reconnect(stop旧trader+重建), is_alive(query探活), _retry_with_reconnect(query/order失败重连重试一次) - query_account/positions/place_order包重试: 断线(异常/None)→reconnect→重试, broker拒单(order_id<=0)不重连 - bridge /health: is_alive真实探活(5s缓存)+断线后台reconnect(不阻塞), 不再假阳性 - trade_calendar: is_trading_day(周一-周五), /order非交易日加warning(120141提示) - test_gateway15+test_trade_calendar6=NAS21passed, 回归bridge_client/d4a 10绿 - 修复Issue#4运维发现: miniQMT重启后bridge自动重连(无需手动重启)