DeepSeek Harness Plugin: dsh-plugin-model-proxy

`dsh-plugin-model-proxy` is a community DSH plugin that addresses the issue of certain models requiring a proxy due to network restrictions while other models remain directly connected. It uses transport-layer routing rules, supports exact, prefix, and wildcard model matching, integrates DSH credentials, supports HTTP/SOCKS protocols, and takes effect in real time. The plugin does not modify the baseURL to avoid masking the upstream, and it provides UI- or file-based configuration. We recommend installing it with profile management to avoid conflicts.