feat(binance_client, position_manager): 增强杠杆设置与异常处理逻辑

在 `binance_client.py` 中为杠杆设置添加了网络超时重试机制，确保在请求超时的情况下能够自动重试，提升了系统的稳定性。同时，在 `position_manager.py` 中优化了临时持仓记录的错误日志，增加了异常信息的详细记录，便于后续调试与问题追踪。这些改进增强了系统的可靠性与可维护性。

trading_system/binance_client.py

@@ -2641,32 +2641,38 @@ class BinanceClient:
         # 必须确保序列中的值小于 target_leverage
         fallback_levels = [50, 20, 10, 5, 3, 2, 1]
         
-        # 第一次尝试：目标杠杆
-        try:
-            await self.client.futures_change_leverage(symbol=symbol, leverage=target_leverage)
-            logger.info(f"设置杠杆成功: {symbol} {target_leverage}x")
-            return target_leverage
-        except BinanceAPIException as e:
-            error_msg = str(e).lower()
-            logger.warning(f"设置杠杆 {target_leverage}x 失败: {e}，尝试降低杠杆...")
-            
-            # 如果是 leverage 相关错误，尝试降级
-            if 'leverage' in error_msg or 'invalid' in error_msg or 'max' in error_msg:
-                for fallback in fallback_levels:
-                    if fallback >= target_leverage:
-                        continue
-                        
-                    try:
-                        await self.client.futures_change_leverage(symbol=symbol, leverage=fallback)
-                        logger.warning(
-                            f"{symbol} 杠杆降级成功: {target_leverage}x -> {fallback}x"
-                        )
-                        return fallback
-                    except BinanceAPIException:
-                        continue
-            
-            logger.error(f"设置杠杆最终失败: {symbol} (目标: {target_leverage}x)")
-            return 0
+        # 第一次尝试：目标杠杆（网络超时重试 2 次）
+        for attempt in range(3):
+            try:
+                await self.client.futures_change_leverage(symbol=symbol, leverage=target_leverage)
+                logger.info(f"设置杠杆成功: {symbol} {target_leverage}x")
+                return target_leverage
+            except (TimeoutError, asyncio.TimeoutError):
+                if attempt < 2:
+                    wait_sec = (attempt + 1) * 3
+                    logger.warning(f"设置杠杆请求超时 ({symbol} {target_leverage}x)，{wait_sec} 秒后重试 ({attempt + 1}/2)")
+                    await asyncio.sleep(wait_sec)
+                else:
+                    logger.error(f"设置杠杆请求超时 ({symbol} {target_leverage}x)，已重试 2 次仍失败")
+                    return 0
+            except BinanceAPIException as e:
+                error_msg = str(e).lower()
+                logger.warning(f"设置杠杆 {target_leverage}x 失败: {e}，尝试降低杠杆...")
+                # 如果是 leverage 相关错误，尝试降级
+                if 'leverage' in error_msg or 'invalid' in error_msg or 'max' in error_msg:
+                    for fallback in fallback_levels:
+                        if fallback >= target_leverage:
+                            continue
+                        try:
+                            await self.client.futures_change_leverage(symbol=symbol, leverage=fallback)
+                            logger.warning(
+                                f"{symbol} 杠杆降级成功: {target_leverage}x -> {fallback}x"
+                            )
+                            return fallback
+                        except (TimeoutError, asyncio.TimeoutError, BinanceAPIException):
+                            continue
+                logger.error(f"设置杠杆最终失败: {symbol} (目标: {target_leverage}x)")
+                return 0
     
     def get_realtime_price(self, symbol: str) -> Optional[float]:
         """

trading_system/position_manager.py

@@ -3609,7 +3609,11 @@ class PositionManager:
                         except Exception as e:
                             logger.warning(f"{symbol} 补挂币安止盈止损失败（不影响监控）: {e}")
                     except Exception as e:
-                        logger.error(f"[账号{self.account_id}] {symbol} 创建临时持仓记录失败: {e}")
+                        err_msg = str(e) or repr(e) or type(e).__name__
+                        logger.error(
+                            f"[账号{self.account_id}] {symbol} 创建临时持仓记录失败: {err_msg}",
+                            exc_info=True,
+                        )
                 else:
                     # 已在 active_positions 的持仓：启动前统一补挂/修正交易所 SL/TP（识别缺止盈、止损过远等异常并替换）
                     position_info = self.active_positions.get(symbol)