The ipwho.is default rejected server-side egress with a 403 on the free
plan, which the resolver swallowed as a clean miss, so the admin
login/audit overview rendered "—" for every session. Switch the default
online provider to ip-api.com (the parser already accepts its
status/countryCode shape) and surface a non-ok HTTP status (403/429/5xx)
as a wide-event warning instead of returning null silently, so a future
provider rejection is visible.
Whitelist TRUST_CF_CONNECTING_IP, IP_GEO_LOOKUP_URL and
IP_GEO_LOOKUP_DISABLED in the compose environment block and document them
in .env.production.example so a Cloudflare-fronted deployment can store
the real visitor IP rather than the edge address.