Add partition column to system part_log and merge table

Why it matters

This feature allows users to easily track and analyze parts by their partition directly from the system.part_log and merge table. It improves observability and debugging capabilities related to partitioning in ClickHouse, providing more detailed metadata for parts.

How to use it

Users can query the system.part_log or merge table to see the new partition column included automatically without any additional configuration or enablement steps required.