win.42 - node world map on the pool page

The pool web page now shows a world map of all nodes: the pool server geolocates each node's IP (server-side, ip-api, per-IP cached) and the landing page plots them with Leaflet + marker clustering on dark map tiles. Only coarse lat/lon + city/country reach the browser - no IPs or peerIds. Redeploy: copy the new DigiAssetPoolServer.exe and re-copy pool/deploy/site/ (or re-run setup-caddy.ps1).