dsh-plugin-gate: Installation Security Gate and Data Protection for DeepSeek Harness

`dsh-plugin-gate` is a security plugin for DeepSeek Harness that protects ecosystem security through static scanning and operation blocking. Its core features include scanning plugin source code against 60 rules (covering credential theft and supply chain vulnerabilities), as well as providing baseline comparisons and reports. It also assesses risks before destructive commands are executed to prevent accidental deletion of critical files. The plugin supports scanning npm packages and local directories, offers flexible configuration, and can be integrated into CI workflows, though users should be mindful of dependency requirements and the risk of false positives.