集群流控动态伸缩及节点上下线变化设计 | Cluster token server HPA and discovery for server change

请问下集群限流场景下，
1、Token Server如何实现自动根据限流阈值调整动态伸缩；
2、Sentinel Client如何感知Token Server节点上下线的变化

有没有统一的解决方案，或者怎么配置

Start by reviewing the existing cluster flow-control design and the Token Server and Sentinel Client entry points; the payload does not identify files or tests. Define how Token Server scaling follows the rate limit threshold, how clients discover server joins and departures, and what configuration or unified solution demonstrates that behavior.

Written by the indexing model from the issue text.