Phones on the FIPS mesh reach the node at http://[<fips0 ULA>], but every
shipped nginx config listened on IPv4 only — nothing answered [::]:80/443,
so mesh HTTP failed with the tunnel fully healthy (found live on
framework-pt during the vc24 5G session, 2026-07-23). Canonical conf gains
listen [::] lines and patch_nginx_conf self-heals deployed nodes (covers
the sites-enabled -> archipelago-http dev variant via the existing
canonicalize pass); validated by the existing nginx -t + rollback flow.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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