DeepSeek Harness Persistent Scheduled Tasks and Heartbeat Plugin

`dsh-scheduled` is a global automation plugin for DeepSeek Harness (DSH), maintained by ylxmf2005. It supports persistent scheduling across sessions and projects, based on the RFC 5545 standard, with features such as scheduled tasks, heartbeat recovery, DST time zone awareness, and atomic JSON data storage. The plugin provides Agent tools and a Web interface for management, and supports Git Worktree isolation. Installation methods include specifying a commit, using a prebuilt package, or building from source. The environment requires Node.js >= 22.19.0. It provides DSH with reliable automation capabilities through robust error handling and lifecycle management.