Fix events structure to prevent "Instance not found" exception

src/api/integrations/event/rabbitmq/controllers/rabbitmq.controller.ts

@@ -102,7 +102,7 @@ export class RabbitmqController extends EventController {
     });
 
     if (!data) {
-      return null;
+      throw new NotFoundException('Instance websocket not found');
     }
 
     return data;

src/api/integrations/event/sqs/controllers/sqs.controller.ts

@@ -88,7 +88,7 @@ export class SqsController extends EventController {
     });
 
     if (!data) {
-      return null;
+      throw new NotFoundException('Instance websocket not found');
     }
 
     return data;

src/api/integrations/event/webhook/controllers/webhook.controller.ts

@@ -62,7 +62,7 @@ export class WebhookController extends EventController {
     });
 
     if (!data) {
-      return null;
+      throw new NotFoundException('Instance websocket not found');
     }
 
     return data;

src/api/integrations/event/websocket/controllers/websocket.controller.ts

@@ -99,7 +99,7 @@ export class WebsocketController extends EventController {
     });
 
     if (!data) {
-      return null;
+      throw new NotFoundException('Instance websocket not found');
     }
 
     return data;