/**
 * Migration 049: Add auto_archive_delay_minutes column to the settings table.
 *
 * Adds one new column for configuring automatic archiving of completed features:
 *  - auto_archive_delay_minutes (INTEGER DEFAULT 10): minutes after completion
 *    before a Maintain-state feature is auto-archived. 0 = disabled.
 *
 * Default value of 10 means completed features are archived after 10 minutes.
 * Guards against duplicate column errors using table_info pragma.
 */
import type { MigrationParams } from 'umzug';
import type Database from 'better-sqlite3';
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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