System Table Updates: Added partition_id Column to system.merges

Why it matters

This feature adds the partition_id column to the system.merges table to allow users to easily identify the partition involved in ongoing merges. It improves monitoring and debugging of merges by providing detailed partition-level information.

How to use it

Users can query the system.merges table to view the new partition_id column as part of the system's real-time merges data. No additional configuration is required.