Recover controlled items after crash
After a crash, a VILLAScontroller should be able to recover all the items that it controlled before (not only the default items).
Simple approach: Checkpoint the controlled items in a file or DB once the set of controlled items changes, e.g. if a new simulator is created. Then this Checkpoint can be used to recover from a crash.
Question: Where to safely store the Checkpoint so that it is not destroyed with a crash? Separate Checkpoint config map in k8s for each controller?