SFTP Artifact Upload

Uploads one or more files or directories to a remote server via SFTP.

Features:

• SSH private key authentication (recommended) or password authentication
• Multiple artifacts per run (newline-separated paths, glob patterns supported)
• Recursive directory upload
• Creates the remote target directory (including parents) if it does not exist

For password authentication the step uses sshpass. On Linux stacks it is installed automatically via apt-get; on macOS stacks the step installs it from a Homebrew tap at runtime. SSH key authentication needs no extra tools and is the recommended setup — store the key in a Secret and reference it in the ssh_private_key input.