Test assertions were out of sync with the coreerr.E() error format
introduced in 9a24df3 — updated 8 assertions from "prefix 404" to
"prefix: HTTP 404". Added round-trip tests for UpdateRecord,
EnsureRecord, ClearACMEChallenge, CreateLoadBalancer, DeleteLoadBalancer,
CreateSnapshot, GetLoadBalancer, ListLoadBalancers, GetServer, and unit
tests for HostsByRole/AppServers. Coverage: 62.5% → 80.9%. Updated
CLAUDE.md to reflect go-log/go-io dependencies and coding standards.
Co-Authored-By: Virgil <virgil@lethean.io>