dsh-ip-https: DeepSeek Harness Plugin: Remote Setup + Let's Encrypt IP Certificate

`dsh-ip-https` is a DeepSeek Harness plugin designed to address browser errors and permission restrictions when accessing via a public IP. It injects a script to polyfill `crypto.randomUUID` and modifies request headers to bypass RPC 403 errors. Core features include automatically detecting the public IP and requesting a Let's Encrypt IP certificate to enable HTTPS access, supporting login-free redirect and remote write configuration. The plugin requires no domain name or ICP filing, but ports 80/443 must be open, making it suitable for remote management scenarios without a domain.