feat(metrics): integrate Sentry tracing

package.json

@@ -79,6 +79,7 @@
 		"@polyfiller/form-data": "0.0.40",
 		"@polyfiller/object-fit": "0.0.39",
 		"@sentry/node": "6.4.0",
+		"@sentry/tracing": "6.4.0",
 		"@swc/core": "1.2.57",
 		"@webcomponents/custom-elements": "1.4.3",
 		"@webcomponents/shadycss": "1.10.2",

src/api/server/server.ts

@@ -16,7 +16,7 @@ export class Server implements IServer {
 	async initialize(): Promise<void> {
 		const app = express();
 
-		await this.metricsService.initialize();
+		await this.metricsService.initialize(app);
 		await this.metricsService.configureRequestHandlers(app);
 
 		// Options

src/service/metrics/i-metrics-service.ts

@@ -1,7 +1,7 @@
 import {Express} from "express";
 
 export interface IMetricsService {
-	initialize(): Promise<void>;
+	initialize(app: Express): Promise<void>;
 	configureRequestHandlers(app: Express): Promise<void>;
 	configureErrorHandlers(app: Express): Promise<void>;
 }

src/service/metrics/noop-metrics-service.ts

@@ -2,7 +2,7 @@ import {IMetricsService} from "./i-metrics-service";
 import {Express} from "express";
 
 export class NoopMetricsService implements IMetricsService {
-	async initialize(): Promise<void> {}
+	async initialize(_app: Express): Promise<void> {}
 
 	async configureRequestHandlers(_app: Express): Promise<void> {}
 

src/service/metrics/sentry-service.ts

@@ -1,18 +1,26 @@
 import {IMetricsService} from "./i-metrics-service";
-import {init, Handlers} from "@sentry/node";
+import {init, Handlers, Integrations} from "@sentry/node";
+import {Integrations as TracingIntegrations} from "@sentry/tracing";
 import {environment} from "../../environment/environment";
 import {Express} from "express";
 
 export class SentryService implements IMetricsService {
-	async initialize(): Promise<void> {
+	async initialize(app: Express): Promise<void> {
 		init({
 			dsn: environment.SENTRY_DSN,
+			integrations: [
+				// enable HTTP calls tracing
+				new Integrations.Http({tracing: true}),
+				// enable Express.js middleware tracing
+				new TracingIntegrations.Express({app})
+			],
 			tracesSampleRate: environment.NODE_ENV === "development" ? 1.0 : 0.5
 		});
 	}
 
 	async configureRequestHandlers(app: Express): Promise<void> {
 		app.use(Handlers.requestHandler());
+		app.use(Handlers.tracingHandler());
 	}
 
 	async configureErrorHandlers(app: Express): Promise<void> {