Track owned test processes and restrict fallback cleanup to verified EOS servers using the test configuration. Add regression coverage for denied inspection and cleanup failures.
Fixes#1297
* fix: check port availability without process inspection
Probe local TCP addresses and use process inspection only for optional diagnostics. Preserve occupied-port detection, bounded waits, and port reuse after closed connections.
Fixes#1298
* fix: preserve IPv6 scope IDs in port availability probes
dr-dimitriandGitHub
