CREATE TABLE IF NOT EXISTS announcements (
    id          SERIAL PRIMARY KEY,
    title       VARCHAR(200)  NOT NULL,
    content     TEXT,
    display_type VARCHAR(20)  NOT NULL DEFAULT 'info',
    is_active   BOOLEAN       NOT NULL DEFAULT TRUE,
    starts_at   TIMESTAMPTZ,
    ends_at     TIMESTAMPTZ,
    sort_order  INT           NOT NULL DEFAULT 0,
    created_at  TIMESTAMPTZ   NOT NULL DEFAULT NOW(),
    updated_at  TIMESTAMPTZ   NOT NULL DEFAULT NOW()
);

COMMENT ON COLUMN announcements.display_type IS 'banner | info | urgent';