ALTER TABLE {{p}}draft_attachments ADD COLUMN checksum_sha256 VARCHAR(64) NULL;

CREATE TABLE {{p}}search_outbox (
    id VARCHAR(64) PRIMARY KEY,
    generation VARCHAR(64) NOT NULL,
    event_type VARCHAR(16) NOT NULL,
    message_uid BIGINT NOT NULL,
    folder TEXT NOT NULL,
    payload LONGTEXT NULL,
    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 NULL,
    created_at BIGINT NOT NULL,
    updated_at BIGINT NOT NULL,
    INDEX idx_search_outbox_ready (dead_letter, available_at, claimed_until, updated_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;