[backport/1.4] Fix Ping discovery KeyError on disappearing interfaces

[joaoantoniocardoso]

This is a backport of #4036 into 1.4.

---

Supersedes #4041 (recreated from fork joaoantoniocardoso/BlueOS-docker instead of same-repo head).

[github-actions]

Automated PR Review

0. Summary

• Verdict: LGTM

Backports #4036 into 1.4-dev: replaces network_interface_addresses[interface] with .get(interface, []) in core/services/ping/ping360_ethernet_prober.py:27 to avoid a KeyError when an interface is present in psutil.net_if_stats() but disappears before psutil.net_if_addrs() is called. Adds psutil == 5.7.2 (matching the version pinned across other 1.4-dev services) to core/services/ping/setup.py and to the workspace pyproject.toml, and ships a regression test (test_ping360_ethernet_prober.py) that patches psutil.net_if_stats / net_if_addrs to cover the missing-interface and empty-snapshot cases. The extra sys.path / sys.modules juggling in the test is necessary because 1.4-dev's root pytest collects other services' top-level modules (e.g. ardupilot_manager/exceptions.py) and is called out with a comment.

No further comments, nice job 👍

Generated by PR Review Bot. This is advisory, a human reviewer must still approve.