/**
 * Memory Migrations
 * Schema column migration for older databases.
 * Extracted from memory-initializer.ts (ARCH-4)
 *
 * @module v1/cli/memory-migrations
 */
/**
 * Ensure memory_entries table has all required columns
 * Adds missing columns for older databases (e.g., 'content' column)
 */
export declare function ensureSchemaColumns(dbPath: string): Promise<{
    success: boolean;
    columnsAdded: string[];
    error?: string;
}>;
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