feat(observability): Replace Prometheus package with OpenTelemetry

src/open-telemetry/open-telemetry.module.ts

@@ -0,0 +1,25 @@
+import { Module, OnApplicationShutdown } from "@nestjs/common";
+import { OpenTelemetryModule as UpstreamModule } from "nestjs-otel";
+import { otelSDK } from "./sdk";
+
+@Module({
+  imports: [
+    UpstreamModule.forRoot({
+      metrics: {
+        hostMetrics: true, // Includes Host Metrics
+        defaultMetrics: true, // Includes Default Metrics
+        apiMetrics: {
+          enable: true, // Includes api metrics
+          timeBuckets: [], // You can change the default time buckets
+          ignoreUndefinedRoutes: false, //Records metrics for all URLs, even undefined ones
+        },
+      },
+    }),
+  ],
+  exports: [UpstreamModule],
+})
+export class OpenTelemetryModule implements OnApplicationShutdown {
+  async onApplicationShutdown(): Promise<void> {
+    await otelSDK.shutdown();
+  }
+}