dsh-context-enhancement: Context Enhancement Plugin for DeepSeek Harness

`dsh-context-enhancement` is a context enhancement plugin for DeepSeek Harness, designed to address limited context windows and information dilution in long coding sessions. With core features such as key-point extraction for tools, forget-zone compression, independent session summarization, and main-thread segment compression, the plugin sets `contextual` as the default mode while preserving existing modes, enabling coherent management of context information and persistence of task state. Users must install Node.js 22.19.0 or later and DSH 0.1.2-rc.1, then select this mode through the Web interface to enable automatic context management and view status and summaries on the “Context Optimization” page. The plugin is currently in testing and is compatible only with the specified versions.