OutboxItem

Project

Ticket
    project     ProjectId
    number      Int           Maybe
    created     UTCTime
    title       Text                -- HTML
    source      Text                -- Pandoc Markdown
    description Text                -- HTML
    assignee    Int64         Maybe
    status      Text
    closed      UTCTime
    closer      Int64         Maybe
    accept      OutboxItemId

    UniqueTicketAccept accept

TicketProjectLocal
    ticket  TicketId
    project ProjectId
    accept  OutboxItemId

    UniqueTicketProjectLocal       ticket
    UniqueTicketProjectLocalAccept accept