Add transport-only SSH connectivity for the CLI and Electron desktop through the user's OpenSSH configuration. Remote installation and daemon lifecycle remain explicit, separate operations.
Preserve actionable SSH failure details when the proxy socket closes before the SSH child exits.
Closes#3949
Co-authored-by: James Strain <jstrain@nvidia.com>
Co-authored-by: Reid Levesque <reidlevesque@users.noreply.github.com>
