💡cloudflared tunnel - do not log sensitive headers

**Describe the feature you'd like**

When run with log level debug, cloudflared logs a line like the below, including all headers.

```
2024-12-16T15:04:35Z DBG GET HTTP/1.1 connIndex=1 content-length=0 event=1 headers= host= ingressRule=0 originService=http://: path=
```

The `Authorization` header is particularly sensitive and not one we want appearing in our logs. I'd like to be able to set logging to debug in production without concern for a potential security risk.