feat(zone): add Cloudflare-style traffic overview charts

Expose Zone stats API with multi-host access-log aggregates and time
series, and render unique visitors, requests and data served on the
Zone overview with 24h/7d/30d range controls.

internal/model/openflare_access_log_store.go

@@ -263,6 +263,7 @@ func toNodeAccessLogFilter(query OpenFlareAccessLogQuery) analyticsrepo.NodeAcce
 		NodeID:     query.NodeID,
 		RemoteAddr: query.RemoteAddr,
 		Host:       query.Host,
+		Hosts:      query.Hosts,
 		Path:       query.Path,
 		Since:      query.Since,
 		Until:      query.Until,