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.go

@@ -309,8 +309,10 @@ func openFlareAccessLogQueryFromBucket(query OpenFlareAccessLogBucketQuery) Open
 		NodeID:     query.NodeID,
 		RemoteAddr: query.RemoteAddr,
 		Host:       query.Host,
+		Hosts:      query.Hosts,
 		Path:       query.Path,
 		Since:      query.Since,
+		Until:      query.Until,
 		Page:       query.Page,
 		PageSize:   query.PageSize,
 		SortBy:     query.SortBy,