dsh-auth-lock: Password Authentication Plugin for the DeepSeek Harness Host

`dsh-auth-lock` is a Web deployment security plugin provided by DeepSeek Harness (DSH), designed to protect API, SSE, and WebSocket interfaces through password authentication. It stores passwords using the `scrypt` algorithm and supports session management, access rate limiting, and local loopback protection to defend against timing attacks. After installation, a local password must be set; subsequent access requires verification, and the password can be reset via the command line. Because it depends on specific DSH flows, confirm version compatibility before use.