fix: internal server error when connecting to publication with backward compatibility flag (#32085)

Co-authored-by: Diego Sampaio <8591547+sampaiodiego@users.noreply.github.com>

.changeset/great-yaks-dream.md

+---
+'@rocket.chat/meteor': patch
+'@rocket.chat/ddp-streamer': patch
+---
+
+Fixed an internal server error when using the backwards compatibility flag to connect to the real time API for listening to all server message notifications.

ee/apps/ddp-streamer/src/Publication.ts

@@ -19,7 +19,7 @@ export class Publication extends EventEmitter implements IPublication {
 		this.once('stop', () => client.subscriptions.delete(packet.id));
 
 		this._session = {
-			sendAdded: this.added,
+			sendAdded: this.added.bind(this),
 			socket: client,
 			userId: client.userId,
 		};