Add domain traffic metrics and Grafana dashboard

test/server/dataplane-client.test.js

@@ -24,6 +24,8 @@ test('control uses the dataplane socket protocol', async () => {
   assert.equal(devices.running, true);
   const traffic = await client.observeTraffic();
   assert.equal(traffic.running, true);
+  const domainTraffic = await client.observeDomainTraffic();
+  assert.equal(domainTraffic.running, true);
   await client.observeDevicePolicy();
   await client.applyDevicePolicies([{ id: 'dev_0011223344556677' }]);
   await client.runConnectivityDiagnostics(
@@ -38,18 +40,19 @@ test('control uses the dataplane socket protocol', async () => {
     'POST /apply /run/dataplane.sock',
     'GET /devices /run/dataplane.sock',
     'GET /device-traffic /run/dataplane.sock',
+    'GET /domain-traffic /run/dataplane.sock',
     'GET /device-policy /run/dataplane.sock',
     'PUT /device-policy /run/dataplane.sock',
     'POST /diagnostics/connectivity /run/dataplane.sock',
     'POST /restart /run/dataplane.sock',
     'POST /stop /run/dataplane.sock',
   ]);
-  assert.deepEqual(requests[5].body, { devices: [{ id: 'dev_0011223344556677' }] });
-  assert.deepEqual(requests[6].body, {
+  assert.deepEqual(requests[6].body, { devices: [{ id: 'dev_0011223344556677' }] });
+  assert.deepEqual(requests[7].body, {
     services: [{ id: 'custom-test', url: 'https://example.com' }],
     target: 'site:custom-test',
   });
-  assert.equal(requests[6].timeoutMs, 25_000);
+  assert.equal(requests[7].timeoutMs, 25_000);
 });
 
 test('connectivity diagnostics expose a retryable domain error', async () => {