Enum indicating the states that a Version can take. This enum is not yet frozen and values maybe added later.

STATE_UNSPECIFIED Default value of State.
CREATION_IN_PROGRESS The version creation is in progress.
CREATION_FAILED The version creation failed.
CREATED The version has been successfully created.
REVIEW_IN_PROGRESS The version is under policy review (aka Approval).
APPROVED The version has been approved for policy review and can be deployed.
CONDITIONALLY_APPROVED The version has been conditionally approved but is pending final review. It may be rolled back if final review is denied.
DENIED The version has been denied for policy review.
UNDER_TAKEDOWN The version is taken down as entire agent and all versions are taken down.
DELETED The version has been deleted.