Add client IP information to etcd log

### What would you like to be added?

```json
{
"level": "info",
"ts": "2026-04-13T23:24:49.890285+0800",
"clientip":"x.x.x.x", // can we add ip field ?
"caller": "auth/simple_token.go:175",
"msg": "deleted a simple token",
"user-name": "root"
}
{
"level": "warn",
"ts": "2026-04-13T23:36:18.211339+0800",
"clientip":"x.x.x.x", // can we add ip field ?
"caller": "etcdserver/util.go:167",
"msg": "apply request took too long",
"took": "9.999968424s",
"expected-duration": "100ms",
"prefix": "read-only range ",
"request": "key:\"/tt/tangram/sso_http/\" range_end:\"/tt/tangram/sso_http0\" ",
"response": "",
"error": "auth: invalid auth token"
}
```

### Why is this needed?

Added Client IP field for easier troubleshooting.