Export Asynchronous Metrics of Current Server Threads

Why it matters

This feature addresses the need to monitor and diagnose server thread activity across all ClickHouse servers asynchronously. It helps users track down and troubleshoot issues related to server thread management, improving observability and problem resolution.

How to use it

The feature is enabled by exporting the asynchronous metrics for all servers' current threads. Users can integrate this export into their monitoring setup to gather thread-level metrics across the server cluster.