dsh-workspace-snapshot-fork: Attaching Historical Workspace State to DeepSeek Harness Session Forks

`dsh-workspace-snapshot-fork` is an open-source plugin for DeepSeek Harness (DSH) designed to resolve file state out-of-sync issues when forking sessions. It leverages Git to generate immutable checkpoints for each turn, ensuring the source workspace remains unchanged. The plugin supports regular directories and Git repositories, creating private snapshots or child worktrees depending on the source type. Currently, it only supports the Windows Web profile and requires manual configuration to clean up snapshots and branches. Installation and configuration require attention to the MIT license and version compatibility, and headless forking is not supported.