feat: enhance Redis module exports for pub/sub functionality

- Added 'REDIS_PUBLISHER' and 'REDIS_SUBSCRIBER' to the exports of RedisModule to improve pub/sub capabilities.

src/common/redis/redis.module.ts

@@ -32,7 +32,11 @@ export class RedisModule {
         },
         RedisPubSubService,
       ],
-      exports: [RedisPubSubService],
+      exports: [
+        RedisPubSubService,
+        'REDIS_PUBLISHER',
+        'REDIS_SUBSCRIBER',
+      ],
       imports: [NotificationModule],
     };
   }