Display blocking reason for blocked HTTPS tunnel events in request details

### Issue Details

In cases where AdGuard attempts to filter the HTTPS traffic of an application that does not allow the use of the CA certificate provided by AdGuard, blocked 'HTTPS tunnel' events appear in the log. The reason why the connection is blocked is unclear to users because it is not displayed in the request details.

For example, as shown in the screenshot

### Proposed solution

Add an explanation of the blocking reason for this type of requests on the request details screen.

### Alternative solution

_No response_