dsh-evidence-task-board: DeepSeek Harness Persistent Task State Primitives

`dsh-evidence-task-board` is a DeepSeek Harness (DSH) plugin maintained by MkaliezZ, designed to address pain points around task state persistence and evidence traceability. It acts as a deterministic primitive for state management, offering core capabilities such as creating tasks, changing states, recording evidence, and generating SHA-256 digests, with support for readable rendering. The plugin relies on persistence mechanisms explicitly provided by the host environment for data storage and is intended for scenarios requiring explicit management of task states.