style: apply go fmt to fix indentation and alignment

Fix formatting issues across multiple files:
- logger/decision_logger.go: correct if statement indentation
- main.go: fix DataKLineTime field tab alignment
- trader/auto_trader.go: align struct field comments and code blocks

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

main.go

@@ -37,7 +37,7 @@ type ConfigFile struct {
 	StopTradingMinutes int                 `json:"stop_trading_minutes"`
 	Leverage           LeverageConfig      `json:"leverage"`
 	JWTSecret          string              `json:"jwt_secret"`
-  DataKLineTime      string              `json:"data_k_line_time"`
+	DataKLineTime      string              `json:"data_k_line_time"`
 	News               []config.NewsConfig `json:"news"`
 }