dsh-plugin-duwg: Daily Usage and Cache Statistics for DeepSeek Harness

dsh-plugin-duwg is a DeepSeek Harness (DSH) client plugin designed to address the lack of clear visibility into token consumption and balance. It aggregates input, output, and cached token data from all sessions for the current day, offering compact unit notation (10k/100M), real-time cache hit rate monitoring, a balance health bar, and estimated consumption. Data is calculated from local session logs and official APIs, with process-restart calibration and persistent storage, ensuring privacy and eliminating cloud leakage concerns. It is suitable for developers focused on cost control and cache optimization.