dsh-x-opencode-session: Automatically Attach a Session Header to opencode.ai Requests

This is a plugin developed for DeepSeek Harness that automatically adds the `x-opencode-session` header to requests sent to opencode.ai, avoiding the hassle and errors of manual configuration. It is MIT-licensed and maintained by Coco-king. Core features include automatically attaching the header, keeping the value fixed within the same conversation, using distinct values across different conversations, and maintaining consistency after network disconnections or restarts. Installation is simple and requires no configuration; it only affects the target requests, making it suitable for users of services such as opencode-go.