Adjust compatibility values for max_merge_delayed_streams_for_parallel_write

Why it matters

This change ensures better compatibility and stability when using the max_merge_delayed_streams_for_parallel_write setting, which controls the maximum number of delayed streams allowed during parallel writes. It improves the management of parallel write operations by refining how delayed streams are handled, providing more predictable behavior for users.

How to use it

Users can continue to configure the max_merge_delayed_streams_for_parallel_write setting in their server configuration or queries as before. The adjustment to compatibility values is applied internally and does not require any change in user interaction.