import type { MigrationParams } from 'umzug';
import type Database from 'better-sqlite3';
/**
 * Adds created_by and updated_by columns to all PM entity tables
 * for user attribution tracking. These columns reference pm_users(id)
 * and are nullable for backward compatibility with existing data.
 *
 * Backfills existing rows with the default system user ID.
 */
export declare function up({ context: db }: MigrationParams<Database.Database>): Promise<void>;
export declare function down({ context: _db }: MigrationParams<Database.Database>): Promise<void>;
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