* @param scope cache scope
     * @return lease key or null if not supported
     * @throws SmbException if an error occurs
     */
    public static Smb2LeaseKey requestDirectoryLease(SmbFile smbFile, int requestedState, DirectoryCacheScope scope) throws SmbException {
        if (!smbFile.isDirectory()) {
            throw new SmbException("Directory leasing only supported for directories");
        }

        
        // Schedule periodic cache cleanup
        scheduler.scheduleAtFixedRate(this::cleanupExpiredEntries, 60, 60, TimeUnit.SECONDS);
    }
    
    public Smb2LeaseKey requestDirectoryLease(String directoryPath, 
                                             int requestedState, 
                                             DirectoryCacheScope scope) {
        // Request base lease

     *
     * @param directoryPath directory path
     * @param requestedState requested lease state
     * @param scope cache scope
     * @return lease key
     */
    public Smb2LeaseKey requestDirectoryLease(String directoryPath, int requestedState, DirectoryCacheScope scope) {
        // Directory leasing requires SMB 3.0 or higher
        // MS-SMB2: Level 2 leasing (which includes directory leasing) is only supported in SMB 3.0+