The backend host and LAN IPs are kept out of source by convention; the prior
commit committed the real primary/fallback IPs into AGENTS.md and the new test.
Swap them for neutral wording and the RFC 5737 documentation IP (192.0.2.1).
These IPs remain in commit c44a975 (already pushed); purging them from history
is a separate filter-repo + force-push decision.
Grant Gilliam
ddee2c4871