dsh-prometheus: Privacy-Aware Monitoring for DeepSeek Harness

`dsh-prometheus` is a monitoring plugin for DeepSeek Harness that provides privacy-friendly Prometheus metrics and Grafana dashboards. Maintained by `xxiaoxiong`, it supports monitoring dimensions such as sessions, the LLM layer, tool calls, approvals, and background tasks. It is enabled by default after installation and can expose metrics endpoints via automatic or standalone modes. Its core advantage is privacy protection: it does not export prompts or message content and exposes only controlled labels. Usage requires Node.js and Cordis environment support, and it is currently a 0.1.0 developer preview.