fix: update StartTime to use UnixMilli for better precision across step functions

step_function.go

@@ -54,7 +54,7 @@ func runStepFunction(r *SessionRunner, step IStep) (stepResult *StepResult, err
 		StepType:    step.Type(),
 		Success:     false,
 		ContentSize: 0,
-		StartTime:   start.Unix(),
+		StartTime:   start.UnixMilli(),
 	}
 	defer func() {
 		attachments := uixt.Attachments{}