Roles the approval also assigns as the approved actor's initial/current
grade, or null when approval confers no specific grade. Each entry MUST
be a role declared on the target actor's analyzed roles
(AutoBeAnalyze.IActorRole).
Actor whose reusable authorization state is approved by this operation. MUST match a database user type and an analyzed actor (AutoBeAnalyze.IActor).
Approval effect: the operation transitions another user of targetActor into a usable/approved authorization state.