DefaultCleanupInterval triggers cache cleanup (lazy eviction) at this interval.

KubernetesVersionTTL is the time before the detected Kubernetes version is removed from cache, to be re-detected next time it is needed.

UnavailableOfferingsTTL is the time before offerings that were marked as unavailable are removed from the cache and are available for launch again.

UnavailableOfferings stores any offerings that return ICE (insufficient capacity errors) when attempting to launch the capacity.