function isValidUUID(uuid) {
	// More precise UUID regex pattern
	const uuidRegex = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
	return uuidRegex.test(uuid);
}
Validates UUID format.
@param {string} uuid - UUID string to validate
@returns {boolean} True if valid UUID