/**
 * MongoDB collection name and index definition for the validation table.
 *
 * Call `createValidationTableIndexes(db)` once during application startup.
 * The function is idempotent — MongoDB silently skips indexes that already exist.
 */
import type { Db } from "mongodb";
export declare const VALIDATION_TABLE_COLLECTION: "build_validation_table";
export type ValidationTableCollectionName = typeof VALIDATION_TABLE_COLLECTION;
/**
 * Creates the required index on `build_validation_table`.
 * The unique compound index on `domain + version` ensures at most one
 * validation table document exists per build.
 */
export declare function createValidationTableIndexes(db: Db): Promise<void>;
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