DeepSeek Harness Plugin: axelfreeman/backupper

The DSH plugin `axelfreeman/backupper` provides a solution to pull encrypted, deduplicated backups from a Windows PC to a remote Linux server. It uses Restic for AES-256 encryption and streams over SSH, achieving zero server-side dependencies. The plugin supports automatic verification and streams a `tar` package to a local repository, making it suitable for scenarios with constrained server environments where data security is critical.