Racing condition in cleanup
When starting a tunnel, the Kubernetes Service will be created before the tunnel is created. This might trigger https://gitlab.jsc.fz-juelich.de/jupyterjsc/k8s/images/drf-tunnel/-/blob/3.1.3/web/tunnel/utils.py?ref_type=tags#L568 .
Add a check, to only delete unused services, if the service itself is older than x hours.