*
     * @param timeout timeout in milliseconds
     * @param fieldName the field name for error reporting
     * @throws IllegalArgumentException if timeout is invalid
     */
    public static void validateTimeout(long timeout, String fieldName) {
        if (timeout < 0) {
            throw new IllegalArgumentException(fieldName + " cannot be negative: " + timeout);
        }
        if (timeout > 3600000L) { // Max 1 hour

    void testTimeoutValidation() {
        assertDoesNotThrow(() -> InputValidator.validateTimeout(1000L, "test"));
        assertDoesNotThrow(() -> InputValidator.validateTimeout(0L, "test"));
        assertDoesNotThrow(() -> InputValidator.validateTimeout(3600000L, "test"));

        assertThrows(IllegalArgumentException.class, () -> InputValidator.validateTimeout(-1L, "test"));