SSH remote workspaces for DeepSeek Harness

Key features

• OpenSSH is the only source of connection: Host, Include, Match, Ssh-att, Keychain, Certificate, FIDO/PKCS#11, ProxyJump, ProxyCommand, known hosts and host-key policies are handed over to this machine ssh with plugins no longer copying a missing profile.
• This is Node.js 22 or more.
• stdout only carries the agreement, stderr only keeps the end of the diagnosis with a bound and de-sensitive evidence.
• Automatically install helperplugin package carrying helper, uploading and verifying a private version of the user directory by SHA-256