/**
 * Generate a UUID version 7 (time-ordered UUID).
 *
 * UUID v7 format:
 * - 48 bits: Unix timestamp in milliseconds
 * - 4 bits: Version (0111 for v7)
 * - 12 bits: Random data
 * - 2 bits: Variant (10 for RFC 4122)
 * - 62 bits: Random data
 *
 * @returns A UUIDv7 string in standard format (8-4-4-4-12)
 */
export declare function generateUUID7(): string;
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