Extracts client IP from CF-Connecting-IP or X-Forwarded-For headers
and sets conn.remote_ip before request logging, so K8s logs show the
actual client address instead of the internal cluster/ingress IP.
Use CF-IPLatitude/CF-IPLongitude headers instead of making HTTP calls
to ip-api.com on every page load. Eliminates ~500ms latency, external
API dependency, and flaky tests.
Also disable test server to prevent port conflicts during development.
