WorkflowDefinition
    graph       (WorkflowGraph UserId AuthDNF FileId)
    scope       WorkflowInstanceScope'

WorkflowInstance
    definition  WorkflowDefinition
    graph       (WorkflowGraph UserId AuthDNF FileId)
    scope       (WorkflowInstaceScope TermId SchoolId CourseId)

Workflow
    instance    WorkflowInstance
    graph       (WorkflowGraph UserId AuthDNF FileId)
    initiator   UserId Maybe
    payload     (WorkflowPayload FileId)