contrib/registry/etcd: etcd will not re-register if it is disconnected

[waker-wang]

Go version

go1.22.4 darwin/arm64

GoFrame version

v2.7.2

Can this bug be reproduced with the latest release?

Option Yes

What did you do?

Use ETCD registration service

What did you see happen?

Use etcd to automatically discover, after 1 minute of closing etcd
The service will automatically reconnect to etcd, but it will not re-register the service address

What did you expect to see?

Automatically reconnect when the etcd connection is disconnected and register for the service