Add replicateSubscriptionState to ConsumerConfig

[graham-macdonald-simplisafe]

Summary

The ConsumerConfig interface does not expose replicateSubscriptionState, which is needed for geo-replication failover scenarios where subscription cursor state should be synchronized across clusters.

Context

The underlying C++ client supports replicateSubscriptionStateEnabled as a consumer configuration option, and it is exposed in other clients. The Node.js client wraps the C++ library, so the capability should be available at the binding layer, it just needs to be surfaced in the ConsumerConfig interface and passed through to the C++ ConsumerConfiguration.

Expected API

export interface ConsumerConfig {
    // ... existing properties ...
    replicateSubscriptionState?: boolean;
}

When set to true, the broker synchronizes acknowledgment state for this subscription across geo-replicated clusters, enabling seamless consumer failover without reprocessing the backlog.