/**
 * Shared utilities for tenant defaults merging.
 */
/** Deep merge where `overrides` values win over `base`. */
export declare function deepMerge(base: Record<string, unknown>, overrides: Record<string, unknown>): Record<string, unknown>;
/** Safely access a nested value by dot path. */
export declare function getNestedValue(obj: Record<string, unknown> | undefined, ...keys: string[]): unknown;