fix(multiplayer): propagate allocated playlist

server/allocator/worker.go

@@ -59,10 +59,14 @@ func (w Worker) RunOnce(ctx context.Context) (bool, error) {
 // template. They are derived only from the durable match plan, never client
 // input or mutable worker configuration.
 func AllocationLabels(request domain.AllocationRequest) map[string]string {
-	return map[string]string{
+	labels := map[string]string{
 		"cosmic-clash.io/region":    request.Region,
 		"cosmic-clash.io/build":     request.Build,
 		"cosmic-clash.io/protocol":  strconv.Itoa(request.Protocol),
 		"cosmic-clash.io/transport": request.Transport,
 	}
+	if request.Playlist != "" {
+		labels["cosmic-clash.io/playlist"] = string(request.Playlist)
+	}
+	return labels
 }