Numbered database support for clusters (Valkey 9+)

Is your feature request related to a problem? Please describe. Valkey 9.0 added support for numbered databases in cluster mode. This is useful for logical separation of different applications (e.g. using ACLs with limiting different users to a single logical database) but keep cluster benefits.

Describe the solution you'd like Support the database parameter for the cluster connection, so that the SELECT is correctly issued when connected.

Describe alternatives you've considered Using cluster mode with only key-prefix ACLs -> Works but not as clean as the now possible logical database separation.

Additional context https://valkey.io/blog/numbered-databases/

( I really appreciate your work on this library, its really great software ❤️ )