dsh-plugin-verify: Evidence Verification Toolkit for DeepSeek Harness Agents

`dsh-plugin-verify` is a read-only workflow plugin for DeepSeek Harness (DSH), designed to help agents verify their behavior and environment state through automated checks. It provides multiple verification modes: keyword-based evidence checks, configuration file validation (with JSON/YAML structure testing), HTTP resource probing, NPM package and GitHub repository checks, and batch concurrent checks. The plugin relies on heuristic search, does not support write operations, and is primarily used in code auditing, configuration validation, and resource probing scenarios.