style: format Go code with go fmt

- Fix formatting issues flagged by PR advisory checks
- Run go fmt ./... on all Go files
- No functional changes, code style improvements only

Files formatted:
- api/server.go
- auth/auth.go
- decision/engine.go
- logger/decision_logger.go
- manager/trader_manager.go
- market/monitor.go
- market/types.go
- mcp/client.go
- trader/*.go (aster, auto, binance, hyperliquid)

logger/decision_logger.go

@@ -245,7 +245,7 @@ func (l *DecisionLogger) GetStatistics() (*Statistics, error) {
 					stats.TotalOpenPositions++
 				case "close_long", "close_short", "partial_close":
 					stats.TotalClosePositions++
-				// update_stop_loss 和 update_take_profit 不計入統計
+					// update_stop_loss 和 update_take_profit 不計入統計
 				}
 			}
 		}
@@ -380,7 +380,7 @@ func (l *DecisionLogger) AnalyzePerformance(lookbackCycles int) (*PerformanceAna
 				case "close_long", "close_short":
 					// 移除已平仓记录
 					delete(openPositions, posKey)
-				// partial_close 不處理，保留持倉記錄
+					// partial_close 不處理，保留持倉記錄
 				}
 			}
 		}