Support filtering by complete URL string

Why it matters

This feature allows more precise control over HTTP requests handled by ClickHouse by enabling filtering based on the entire URL. It improves the ability to target specific requests matching full URL patterns, which enhances security, monitoring, and routing capabilities.

How to use it

In your http_handlers configuration, use the full_url directive to specify the complete URL string (including schema and host:port) to filter requests. This allows handlers to selectively process HTTP requests matching the exact full URL pattern.