Populate TransferUtilityDownloadDirectoryResponse with total objects downloaded

[GarrettBeatty]

Stacked PRs:

• ->Populate TransferUtilityDownloadDirectoryResponse with total objects downloaded #4109

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Description

Create TransferUtililityDownloadResponse class which is populated with the number of successful downloads.

Motivation and Context

1. Eventually we will be creating new DownloadWithResponseAPI that will return this object.

Testing

1. dry run in progress 3588c4be-0ad1-4585-bc7e-34ec32c64841

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project
• My change requires a change to the documentation
• I have updated the documentation accordingly
• I have read the README document
• I have added tests to cover my changes
• All new and existing tests passed

License

• I confirm that this pull request can be released under the Apache 2 license

[GarrettBeatty]

what im trying to do here is simply "increment value" when task completes

[Copilot]

Pull Request Overview

This PR adds functionality to track and report the number of successfully downloaded objects in the TransferUtilityDownloadDirectoryResponse. The implementation populates the ObjectsDownloaded property by counting completed download tasks using thread-safe increment operations.

Key changes:

• Added ObjectsDownloaded property to TransferUtilityDownloadDirectoryResponse
• Modified DownloadDirectoryCommand.ExecuteAsync to track successful downloads using a thread-safe counter
• Added dev config for S3 service with patch version bump

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
sdk/src/Services/S3/Custom/Transfer/TransferUtilityDownloadDirectoryResponse.cs	Added ObjectsDownloaded property to track the number of successfully downloaded objects
sdk/src/Services/S3/Custom/Transfer/Internal/_bcl+netstandard/DownloadDirectoryCommand.cs	Implemented counter for successful downloads using task continuations and thread-safe increment
generator/.DevConfigs/c49077d9-90b3-437f-b316-6d8d8833ae73.json	Added dev config specifying this as a patch version change for S3 service

[Copilot]

The ObjectsDownloaded property is not accessible to API consumers because the public DownloadDirectoryAsync and DownloadDirectory methods do not return the response object. The internal command returns TransferUtilityDownloadDirectoryResponse, but the public API methods have return type Task (async) or void (sync), discarding the response.

To make this property useful, the public API signatures should be updated to return Task<TransferUtilityDownloadDirectoryResponse> and TransferUtilityDownloadDirectoryResponse respectively. If this is planned for a future change, consider documenting this as work-in-progress. If the API signature cannot be changed due to backward compatibility, consider an alternative mechanism to expose this information.

[Copilot]

The dev config specifies this as a "patch" change, but this introduces a new public property (ObjectsDownloaded) on TransferUtilityDownloadDirectoryResponse, which is a new feature. According to CONTRIBUTING.md guidelines, new features should be marked as "minor" rather than "patch".

Additionally, if the public API signatures are updated to return the response object (which would be necessary to make this property accessible), that would also constitute a minor version change as it's a backward-compatible API enhancement.

[Copilot]

The type of successfulDownloads should be long to match the ObjectsDownloaded property type. While implicit conversion from int to long works, using consistent types improves code clarity and prevents potential overflow issues if the number of downloads exceeds int.MaxValue.

Suggested change

	int successfulDownloads = 0;
	long successfulDownloads = 0;