Fix missing contentLength in S3 driver listAll by mapping from Size

[necessarylion]

Summary

Fix an issue where contentLength was missing in the S3 driver listAll method.

According to the AWS SDK documentation, ListObjectsV2Command returns objects of type _Object, which do not include a ContentLength field. Instead, the object size is provided through the Size property.

Because of this, the contentLength field was not being populated correctly.

Changes

• Map Size from the ListObjectsV2Command response to contentLength in the S3 driver #createFileMetaData method.

Reference

AWS SDK documentation:
https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/s3/command/ListObjectsV2Command/

_Object structure returned in Contents:

• Size → object size in bytes
• ContentLength is not included in this response

Impact

Ensures contentLength is correctly returned when listing objects from S3 using the listAll method.

[thetutlage]

Thanks for the PR! Could you please add a test covering this fix? We'd like to see a test that verifies contentLength is correctly populated from the Size property when using listAll. We'll review the PR once that's in place.