Watchdog Disabled in Docker by Default - Ctrl+C Handling Fix

Why it matters

The feature disables the Watchdog process in Docker environments by default to avoid unintended process termination. It also fixes the issue where Ctrl+C interruptions were not handled properly, improving stability and usability when stopping ClickHouse containers.

How to use it

When running ClickHouse inside Docker containers, the Watchdog will be disabled automatically by default. Users can now safely use Ctrl+C to stop ClickHouse without facing problems caused by the Watchdog. No additional configuration is needed to enable this behavior.