void testRangeValidation(long value, long min, long max, boolean valid) {
        if (valid) {
            assertDoesNotThrow(() -> InputValidator.validateRange(value, min, max, "test"));
        } else {
            assertThrows(IllegalArgumentException.class, () -> InputValidator.validateRange(value, min, max, "test"));
        }
    }

     * @param max maximum value (inclusive)
     * @param fieldName field name for error reporting
     * @throws IllegalArgumentException if value is out of range
     */
    public static void validateRange(long value, long min, long max, String fieldName) {
        if (value < min || value > max) {
            throw new IllegalArgumentException(fieldName + " must be between " + min + " and " + max + ", got " + value);
        }