fix: handover/handback lifecycle hook

api/src/chat/repositories/subscriber.repository.ts

@@ -80,6 +80,8 @@ export class SubscriberRepository extends BaseRepository<
   ): Promise<void> {
     const subscriberUpdates: SubscriberUpdateDto = updates?.['$set'];
 
+    if ('assignedTo' in subscriberUpdates) {
+      // In case of a handover or handback, emit events
       const oldSubscriber = await this.findOne(criteria);
 
       if (!oldSubscriber) {
@@ -103,6 +105,7 @@ export class SubscriberRepository extends BaseRepository<
         }
       }
     }
+  }
 
   /**
    * Constructs a query to find a subscriber by their foreign ID.