cluster: handle zero-token host refresh races #5

Job	Run time
Test wheels building / Prepare matrix to run for 3.13 on `linux,macos-x86,macos-arm,windows,linux-aarch64`	3s
Test wheels building / Build source distribution	13s
Test wheels building / Build wheels for macos-arm on macos-14	9m 47s
Test wheels building / Build wheels for linux on ubuntu-24.04	14m 23s
Test wheels building / Build wheels for macos-x86 on macos-15-intel	21m 26s
Test wheels building / Build wheels for windows on windows-2022	46m 38s
Test wheels building / Build wheels for linux-aarch64 on ubuntu-24.04-arm	15m 36s
	1h 48m 6s

Provide feedback