feat(streaming): add real-time streaming (MongoDB change streams & S3 bucket watchers) with WebSocket subscriptions and activity stream UI

ts_web/services/index.ts

@@ -1,4 +1,8 @@
 export * from './api.service.js';
+export * from './changestream.service.js';
+
 import { ApiService } from './api.service.js';
+import { ChangeStreamService } from './changestream.service.js';
 
 export const apiService = new ApiService();
+export const changeStreamService = new ChangeStreamService();