flaky test TestMultiBackendJobManager.test_start_job_thread_basic (on windows)? #825

I noticed this test TestMultiBackendJobManager.test_start_job_thread_basic sometimes/randomly fails in the windows env, while it is fine in all the other envs or in subsequent runs

e.g.

• https://github.com/Open-EO/openeo-python-client/actions/runs/18587055996/job/52993235938
• https://github.com/Open-EO/openeo-python-client/actions/runs/18937146210/job/54066766783 (from Move ProcessBasedJobCreator to own submodule #824)

maybe the timing of the test (which involves threading) is too tight for windows?