dsh-usage-unified: Machine-Level Token Usage Statistics for DeepSeek Harness

DeepSeek Harness (dsh) provides a unified log analysis plugin for tracking machine-level token accounting and costs. It supports scanning session logs across different versions and offers core features such as date range controls, model panels, conversation ranking, multi-series trend charts, and call details, with CSV/JSON export. The plugin runs entirely locally, supports Chinese and English as well as dark mode, requires manual installation to enable, and aims to provide users with a consistent data analysis view.