ALTER TABLE {{p}}draft_attachments ADD COLUMN checksum_sha256 TEXT;

CREATE TABLE {{p}}search_outbox (
    id TEXT PRIMARY KEY,
    generation TEXT NOT NULL,
    event_type TEXT NOT NULL,
    message_uid BIGINT NOT NULL,
    folder TEXT NOT NULL,
    payload TEXT,
    attempts BIGINT NOT NULL DEFAULT 0,
    available_at BIGINT NOT NULL DEFAULT 0,
    claimed_until BIGINT NOT NULL DEFAULT 0,
    dead_letter BIGINT NOT NULL DEFAULT 0,
    last_error TEXT,
    created_at BIGINT NOT NULL,
    updated_at BIGINT NOT NULL
);

CREATE INDEX {{p}}idx_search_outbox_ready
    ON {{p}}search_outbox(dead_letter, available_at, claimed_until, updated_at);