v1.10.2 patches: continent persistence, city markers, dynamic map center

C changes:
- gstorage.c: encode continent into root key for --persist --restore survival
- gholder.c: decode continent from root + lat/lng storage
- commons.h: add lat/lng fields to GMetrics struct
- geoip2.c/geoip1.h: extract coordinates from MMDB
- json.c: output lat/lng in geolocation JSON

JS changes:
- Remove cityIndex guard for static HTML city dots
- TopoJSON lat/lng fallback for city coordinates
- updateMap fallback city collection
- Dynamic orthographic center based on visitor count
- Mercator stays at [0,15] for full world view

Co-Authored-By: Claude <noreply@anthropic.com>

docker-compose/configs/goaccess.vanilla.conf

@@ -0,0 +1,10 @@
+tz Europe/Zurich
+time-format %H:%M:%S
+date-format %Y-%m-%d
+log-format COMBINED
+log-file /srv/logs/access.log
+output /srv/report/report.html
+real-time-html true
+ws-url wss://yourdomain
+ssl-cert /srv/certs/yourdomain.crt
+ssl-key /srv/certs/yourdomain.key