CREATE TABLE IF NOT EXISTS milestone (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    wk UUID NOT NULL,
    title TEXT NOT NULL,
    description TEXT,
    state TEXT NOT NULL DEFAULT 'open',
    due_at TIMESTAMPTZ,
    closed_at TIMESTAMPTZ,
    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);