DeepSeek Harness Plugin: dsh-qixin-insight-mcp-oauth

`dsh-qixin-insight-mcp-oauth` is an online tool plugin for DeepSeek Harness, designed to simplify access to Qixin Insight enterprise data. It is based on the OAuth 2.1 (PKCE) standard and supports connecting, checking status, and disconnecting through conversational commands. The plugin requires no configuration files; credentials are securely stored in the DSH service and support automatic refreshing, but users must disconnect before uninstalling.