perf: batch group unread fanout

server/monitoring_http_test.go

@@ -90,6 +90,7 @@ func TestServeMetricsIncludesWSConnections(t *testing.T) {
 	immetrics.KafkaMessagePersistTotal.WithLabelValues("p2p", "batch_ok").Add(0)
 	immetrics.KafkaConsumerLag.WithLabelValues("test", "topic", "group").Set(0)
 	immetrics.KafkaDeadLettersTotal.WithLabelValues("p2p", "test").Add(0)
+	immetrics.ObserveInternalQueueEnqueue("test", 0, 1, true)
 	wrt := httptest.NewRecorder()
 	serveMetrics(wrt, httptest.NewRequest(http.MethodGet, "/metrics", nil))
 
@@ -102,6 +103,7 @@ func TestServeMetricsIncludesWSConnections(t *testing.T) {
 	}
 	for _, metric := range []string{"im_ws_connections_active", "im_cluster_p2m_queue_length",
 		"im_cluster_p2m_enqueue_total", "im_cluster_rpc_duration_seconds", "im_cluster_route_total",
+		"im_internal_queue_enqueue_total", "im_internal_queue_depth", "im_internal_queue_capacity",
 		"im_kafka_message_persist_total", "im_kafka_consumer_lag", "im_kafka_dead_letters_total"} {
 		if !strings.Contains(body, "# HELP "+metric+" ") {
 			t.Fatalf("metric %s was not exported", metric)