bugfix: expose prefix cache usage across APIs.#82

XuZhang99 merged 5 commits into

xLLM-AI:mainxLLM-AI/xllm-service:mainfrom

phantomlei3:bugfix/pd-prefix-cache-usagephantomlei3/xllm-service:bugfix/pd-prefix-cache-usageCopy head branch name to clipboard