DeepSeek Harness Plugin: dsh-fetch-data

`dsh-fetch-data` is a structured data extraction plugin for DeepSeek Harness, designed to capture raw JSON data by intercepting page XHR/fetch requests to address `read_url`'s shortcomings in retaining metadata associations and precision. It supports Structure mode (displaying the endpoint list) and Field mode (extracting specified paths), with features such as automatically selecting endpoints that contain arrays, automatic scrolling, and JSONP unwrapping. It relies on the Playwright engine and is suited for capturing precise values such as leaderboards and prices, but cannot handle data behind login walls or purely static sites.