Hi, Team:

According to the data contract specification, sftp is a vlida data source type. However, currently the cli does not supporting testing sftp connections on the server side. This limits our ability to fully validate and verify data contract that define sftp as a source, which is still largely used in legacy system and areas.

Please add support in cli for testing sftp data sources, similar to how other sources (e.g. s3, postgres etc.) are supported.

In our project, we rely on sftp for several data exchanges and need to ensure that contracts are valid and connections functional during CI/CD testing. without official support sftp, this currently has to be tested via workarounds.

Thanks for your great work on this tool!