feat: 一票制并发锁 + MT5硬止损兜底

- 一票制: _pending_long/_pending_short 计数器防同一周期内多信号穿透
- 硬止损: MT5下单时附带sl/tp，倍率1.5x(止损)/1.3x(止盈)，比EA软止损更宽
- config.py: 新增 hard_sl_multiplier/hard_tp_multiplier
- 全部 send_order 链路(abc/remote/live/server/dryrun/backtest) 支持 sl/tp 参数
- 对冲模块: 彻底移除
- 日志: 去重+30轮摘要

core/data/live.py

@@ -53,7 +53,7 @@ class LiveDataProvider(DataProvider):
     def get_symbol_info(self, symbol):
         return _get_mt5().symbol_info(symbol)
 
-    def send_order(self, symbol, order_type, volume):
+    def send_order(self, symbol, order_type, volume, sl=None, tp=None):
         price_data = self.get_current_price(symbol)
         if not price_data:
             logger.error(f"无法获取 {symbol} 价格，无法下单")
@@ -92,6 +92,8 @@ class LiveDataProvider(DataProvider):
             "volume": volume,
             "type": order_type_mt5,
             "price": price,
+            "sl": sl or 0.0,       # ★ MT5 硬止损（0=不设）
+            "tp": tp or 0.0,       # ★ MT5 硬止盈
             "deviation": 20,
             "magic": 234000,
             "comment": f"{order_type} order",