import type { MigrationDb } from "./index";
/**
 * Migration 090: Add `job_archive` provenance table for issue #901.
 *
 * `pruneTerminalJobs` removes rows that have already reached a
 * terminal state (cancelled / completed / dead) and lived beyond the
 * configured retention window. To preserve provenance — required by
 * the issue's "preserving provenance" constraint — we copy the full
 * source row to `job_archive` before deleting it. The archive table
 * holds the original payload plus bookkeeping columns (`archived_at`,
 * `archived_by`, `reason`, `source_table`).
 *
 * Idempotent: `CREATE TABLE IF NOT EXISTS`. Safe to re-run.
 */
export declare function up(db: MigrationDb): void;
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