dsh-web-search-codex: Integrating Codex Web Search into DSH Web Runtime

`dsh-web-search-codex` is a Web search plugin specifically designed for DeepSeek Harness (DSH). It aims to connect search requests to the Codex `/alpha/search` compatible interface. The plugin primarily registers the `codex` search provider, supporting the reuse of existing OpenAI configurations or the independent entry of an API endpoint and API Key. Its core features include automatically following the current session model when the model field is left blank, support for HTTP/HTTPS, sending only the current search term without reading conversation history, and rejecting all HTTP redirects to ensure key security. The installation requires DSH version `0.1.2-rc.1` or later, and a Node.js version of 22.19 or higher. Users can install it via NPM.