Resolve memory leak caused by circular reference in client finalizer

[reugn]

A circular reference between the client object and the cluster object prevents the client's finalizer from executing, resulting in a memory leak. The issue can be reproduced by creating and closing multiple client instances in a loop. To resolve this, the client instance has been injected into the batch commands directly.

[khaf]

@reugn Thanks for the pull request. Is the issue the finalizer not being called, or the memory leak after the finalizer call?

[reugn]

The finalizer is not being called, causing the memory leak.