v25.03.0

What's Changed

• Make tox-env argument required by @jl-wynen in #269
• Use proper backend version arg by @jl-wynen in #270
• Add file transfer to select among children by @jl-wynen in #273
• Add more options for connecting to an SFTP server by @jl-wynen in #274
• Add CopyFileTransfer by @jl-wynen in #277

Full Changelog: 25.01.0...25.03.0