CREATE TABLE IF NOT EXISTS notification_settings (
    id           BIGSERIAL PRIMARY KEY,
    account_id   BIGINT       NOT NULL,
    user_id      BIGINT       NOT NULL,
    email_flags  INTEGER      NOT NULL DEFAULT 0,
    push_flags   INTEGER      NOT NULL DEFAULT 0,
    created_at   TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
    updated_at   TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
    deleted_at   TIMESTAMPTZ  DEFAULT NULL
);
CREATE INDEX IF NOT EXISTS idx_notification_settings_account_user ON notification_settings (account_id, user_id);
CREATE INDEX IF NOT EXISTS idx_notification_settings_deleted_at ON notification_settings (deleted_at);