DataLakeDirectoryClient::ListPaths() throws exception for folders whose names contain spaces. #7475

Describe the bug
DataLakeDirectoryClient::ListPaths() throws Azure::Storage::StorageException exception on folders whose names contain spaces.

For example, we have the code part below. Its throws Azure::Storage::StorageException exception with "404 The specified path does not exist." message, even when specified folder(which name contains space) exist.

      DataLakeDirectoryClient cleint = DataLakeDirectoryClient::CreateFromConnectionString(connectionString, containerName, folderPath, options);
      client.GetSubdirectoryClient("Test Folder/").ListPaths(includeSubfolders, ListPathsOptions{});

When we use this code part it works correct.

      DataLakeDirectoryClient cleint = DataLakeDirectoryClient::CreateFromConnectionString(connectionString, containerName, folderPath + "Test Folder/", options);
      client.ListPaths(includeSubfolders, ListPathsOptions{});

My investigation shows the root cause comes from the file ...\azure-sdk-for-cpp-azure-storage-common\sdk\storage\azure-storage-common\src\crypt.cpp and functions UrlEncodeQueryParameter().

Root cause

When we call the ListPaths it has nested call to the _internal::UrlEncodeQueryParameter to encode folder's path.
Meanwhile the GetSubdirectoryClient also has nested call to the function _internal::UrlEncodePath().
As a result, when we make a call client.GetSubdirectoryClient("Test Folder/").ListPaths(includeSubfolders, ListPathsOptions{}) the folder name "Test Folder/" encodes twice. After first encode from the GetSubdirectoryClient() the "Test Folder/" becomes "Test%20Folder/". And after second encode it becomes "Test%2520Folder/". If we decode the last string, it will be "Test%20Folder/", which is incorrect. The decoded path should be same "Test Folder/".

If we added '%' symbol to the doNotEncodeCharacters += "/:@?"; line in the function UrlEncodeQueryParameter(), it should fix the issue.

Exception or Stack Trace

Azure::Storage::StorageException with error message

404 The specified path does not exist.
The specified path does not exist.
RequestId:ec627031-101f-007a-1754-5df83a000000
Time:2026-10-16T09:55:26.3272893Z
Request ID: ec627031-101f-007a-1754-5df83a000000

Code Snippet

      DataLakeDirectoryClient cleint = DataLakeDirectoryClient::CreateFromConnectionString(connectionString, containerName, folderPath, options);
      client.GetSubdirectoryClient("Test Folder/").ListPaths(includeSubfolders, ListPathsOptions{});

Expected behavior
The folders should be visible and accessible regardless of whether the folder name contains spaces.

Setup (please complete the following information):

• OS: [e.g. Windows]
• IDE : [e.g. Visual Studio Professional 2022]
• Version of the Library used: azure-core_1.16.4, azure-storage-common_12.15.0, azure-storage-files-datalake_12.17.0

Information Checklist
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