hi Signoz team, i'm testing out Signoz locally with the Docker standalone setup. Signoz is running fine with the test app (HotROD), and i'm sending sample metrics from a custom NodeJS script:

import { NodeSDK } from "@opentelemetry/sdk-node";
import { OTLPMetricExporter } from "@opentelemetry/exporter-metrics-otlp-proto";
import { PeriodicExportingMetricReader } from "@opentelemetry/sdk-metrics";
import { metrics, Counter, Gauge, Histogram } from "@opentelemetry/api";

// Configure the OTLP exporter
const metricExporter = new OTLPMetricExporter({
  url: "<http://0.0.0.0:4318/v1/metrics>", // Signoz OTLP HTTP endpoint
});

const metricReader = new PeriodicExportingMetricReader({
  exporter: metricExporter,
  exportIntervalMillis: 1000,
});

// Initialize the SDK
const sdk = new NodeSDK({
  metricReader,
});

sdk.start();

const meter = metrics.getMeter("app");

// Create metrics
const testCounter: Counter = meter.createCounter("test_abc", {
  description: "Total number of HTTP requests",
  unit: "1",
});

const testGauge: Gauge = meter.createGauge("test_gauge", {
  description: "Total number of HTTP requests",
});

const testHistogram: Histogram = meter.createHistogram("test_time_taken", {
  description: "Total time taken for HTTP requests",
  unit: "ms",
});

// Call the metrics
testCounter.add(25);
testCounter.add(10);

testGauge.record(10);

testHistogram.record(10);
testHistogram.record(15);

i'm trying to plot these on a dashboard. strangely, for the counter and histogram, i do see the names of the metrics being registered but there's no data when i try to query (see screenshot below, i've sent the request multiple times), but for the gauge i am able to query and plot the data. probably missing something obvious, appreciate if someone can point me in the right direction!