[Misc] Add type alias ReqId and EngineId for better readability#19880

WoosukKwon merged 1 commit intovllm-project:mainvllm-project/vllm:mainfrom

lk-chen:pd_nixl_conn_type_aliaslk-chen/vllm:pd_nixl_conn_type_aliasCopy head branch name to clipboard