CREATE TABLE IF NOT EXISTS vtiger_archive_transfers (
    id BIGSERIAL PRIMARY KEY,
    direction VARCHAR(10) NOT NULL CHECK (direction IN ('export','import')),
    bundle_sha256 VARCHAR(64),
    through_version_id BIGINT,
    source_instance VARCHAR(255),
    status VARCHAR(20) NOT NULL CHECK (status IN ('running','completed','failed')),
    counts JSONB NOT NULL DEFAULT '{}'::jsonb,
    error_message TEXT,
    initiated_by INTEGER REFERENCES users(user_id) ON DELETE SET NULL,
    started_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    completed_at TIMESTAMPTZ
);
CREATE INDEX IF NOT EXISTS idx_vtiger_archive_transfers_started ON vtiger_archive_transfers(started_at DESC);