feat(sso): ✨ remove redis auth credentials for throttler

features/sso/backend-api/src/common/security/throttling/throttler-storage-redis.service.ts

@@ -25,8 +25,7 @@ export class ThrottlerStorageRedisService
         host: redisConfig.host,
         port: redisConfig.port,
       },
-      username: 'default',
-      password: '',  // Empty string signals no authentication
+      // No username or password - completely disable authentication
     });
   }