Add last_queue_update_exception column to system.replicas table

Why it matters

This feature provides enhanced visibility into the replication process by exposing the last exception encountered during queue updates for replicas. It helps users diagnose and troubleshoot replication issues more effectively.

How to use it

Query the system.replicas table to view the last_queue_update_exception column, which will display the last error message related to the replica's queue update process, for example:

SELECT replica, last_queue_update_exception FROM system.replicas;