Cleanup orphan-enumeration + removal, the backend setup/status/teardown/
cleanup classmethod delegates, guest-IP parsing, the unprivileged nft/TAP
probes, console-tail, and require_firecracker preflight branches. Lifts
the unit-only diff-coverage on the firecracker backend substantially;
the deep VM boot/SSH orchestration remains integration-covered.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WBMWTEtQdJ4W5UrWuLHCck
