dsh-maestro-review: A Pluggable MR Review Pipeline for DeepSeek Harness

`dsh-maestro-review` is a pluggable MR review plugin for DeepSeek Harness, designed to address the automation and standardization of code merge review. The plugin receives GitLab events via Webhook, runs review or audit agents in isolated worktrees, and uses the `review-findings` tool to output structured results. Its core features include a unified `ReviewProvider` interface, support for disposable worktrees, headless execution in CI environments, and event deduplication mechanisms. It provides multiple workflows, such as quick review and deep review, supports reusing images and templates in CI, and enables automated pipelines. During deployment, attention must be paid to version synchronization (between npm and Docker images) and environment dependencies, and it integrates well into existing systems.