dsh-backup-migrator: One-Click Backup and Migration for the DeepSeek Harness Plugin Environment

The `zhengjy01/dsh-backup-migrator` plugin provides a complete environment migration solution for DeepSeek Harness (DSH), similar to VSCode Settings Sync. It enables one-click backup and restore of plugins, configuration files, and system-level scripts (such as launchd) through a Git repository, supporting rollback via Git history and automated scheduling. After installation, configure the repository URL, then use commands such as `dshbackup_backup` and `dshbackup_restore` to complete environment migration or rollback.