Expose Total Errors Since Last Server Restart as ClickHouseErrorMetric_ALL

Why it matters

This feature provides users with a consolidated metric reflecting the total count of errors encountered by the ClickHouse server since its last restart. It helps in monitoring and diagnosing the overall error rate, improving observability and operational insight.

How to use it

Users can access the new ClickHouseErrorMetric_ALL metric from the server's error metrics interface. This metric will be available automatically after the server is updated; no additional configuration is required.