如何在Spring Cloud Sleuth中为Command Line Runner设置行李字段？

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-sleuth</artifactId>
</dependency>

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;
import brave.Span;
import brave.Tracer;

@Component
public class MyCommandLineRunner implements CommandLineRunner {
    @Autowired
    private Tracer tracer;
    
    @Override
    public void run(String... args) throws Exception {
        Span span = tracer.currentSpan();
        span.tag("luggage", "value");
        // 其他业务逻辑
    }
}