The source exists and its credentials were verified.
The source is available but might not be usable yet due to unvalidated
credentials or another reason. The credentials referred to are the ones
to the Source. The error message will contain further details.
The source was sampled by health checks and is not available.
The state was not sampled by the health checks yet.
The state is unknown. This is used for API compatibility only and is not
used by the system.