dsh-response-meta: A Real-Time Response Metadata Plugin for DeepSeek Harness

`dsh-response-meta` is a web plugin for DeepSeek Harness (DSH) designed to improve the observability of streaming output. It displays metrics such as model name, inference progress, throughput, and time to first token in real time within the response stream. Installation requires DSH 0.1.5-rc.1, takes effect after a service restart, supports manual interruption scenarios, and automatically hides duplicate native timestamps.