[Part 2/6] feat(telemetry): add activity detector with user interaction tracking (#8111)

packages/core/src/telemetry/index.ts

@@ -59,3 +59,10 @@ export { SemanticAttributes } from '@opentelemetry/semantic-conventions';
 export * from './uiTelemetry.js';
 export { HighWaterMarkTracker } from './high-water-mark-tracker.js';
 export { RateLimiter } from './rate-limiter.js';
+export { ActivityType } from './activity-types.js';
+export {
+  ActivityDetector,
+  getActivityDetector,
+  recordUserActivity,
+  isUserActive,
+} from './activity-detector.js';