dsh-trace: DeepSeek Harness Web Plugin

`dsh-trace` is a web plugin for DeepSeek Harness designed to transform previously invisible HTTP exchanges into visualized debugging data. It records full request and response details, including conversation structure, reasoning processes, and API data, and supports multiple protocol formats, including OpenAI. The plugin offers automatic refresh, cursor-based pagination, and data masking, with data stored in a local SQLite database and retained for the most recent 24 hours by default. Developers can use it as an enhanced view of official traces to inspect specific details of model calls.