The final state of human review on a processed document.
Values:
STATE_UNSPECIFIED (0):
Human review state is unspecified. Most
likely due to an internal error.
SKIPPED (1):
Human review is skipped for the document.
This can happen because human review isn't
enabled on the processor or the processing
request has been set to skip this document.
VALIDATION_PASSED (2):
Human review validation is triggered and
passed, so no review is needed.
IN_PROGRESS (3):
Human review validation is triggered and the
document is under review.
ERROR (4):
Some error happened during triggering human review, see the
state_message
for details.