Add a Message in Case of Queue_wait_max_ms Wait Takes Place

Why it matters

This feature improves observability by alerting users whenever the system experiences delays due to queue_wait_max_ms wait times. It helps diagnose and understand performance bottlenecks related to query queue wait limits.

How to use it

No explicit action is required to enable this feature; when a wait caused by queue_wait_max_ms triggers, ClickHouse will automatically output a corresponding message indicating the wait event.