feat(core): add mock implementations (users, articles, auth, telemetry)

packages/core/src/infrastructure/services/mock-telemetry.service.ts

@@ -0,0 +1,10 @@
+import { injectable } from "inversify";
+
+import type { ITelemetryService } from "@/application/services/telemetry.service.interface.js";
+
+@injectable()
+export class MockTelemetryService implements ITelemetryService {
+  async startSpan<T>(_name: string, fn: () => T | Promise<T>): Promise<T> {
+    return fn();
+  }
+}