Today, the orchestration job just says:

> any new images? OK, then rebuild registries and metadata
> any new images other than registries? OK, rebuild metadata

In future, we could revamp it to say:

> check devfile registry for list of referenced images. Check if any are newer than the stored version. If found, rebuild and update cache file in registry.
> check plugin registry for list of referenced images. Check if any are newer than the stored version. If found, rebuild and update cache file in registry.
> if neither of those happened, check operator metadata container for list of referenced images. Check if any are newer than the stored version. If found, rebuild and update cache file outside registries (full list of containers).