dsh-security-doctor: One-Click Security Health Check for DeepSeek Harness

`dsh-security-doctor` is a one-click local security health-check tool for DeepSeek Harness, with its core value lying in “read-only” access and “zero outbound transmission.” Through static scanning and configuration auditing, it checks `!!js` expressions, third-party plugins, credential permissions, outbound intent, and protection policies, and provides a graded report with remediation recommendations. Its experimental “guardian mode” can also monitor outbound requests and detect environment changes. After installation, `dsh web` must be restarted for the tool to take effect, making it suitable for developers focused on local environment security.