dig @9.9.9.9 fails in the agent sandbox, which allows no UDP, so bw
test aborted there. The check now asks dns.google over HTTPS and runs
once per bw test instead of once per node.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RywMtsL8qXG7GDY3MHq9Uh