dsh-requirements-alignment: DeepSeek Harness's Requirement Drift Prevention Plugin

`dsh-requirements-alignment` is a DeepSeek Harness (DSH) plugin designed to address the "requirement drift" issue during the execution of long-task agents. Unlike the Plan Mode, which reviews plans before implementation, it establishes and maintains a "Requirement Baseline" comprising goals, constraints, and user decisions to continuously protect the initial intent at runtime. Its core mechanisms include: recording the baseline using the `establish_baseline` tool; automatically detecting directional drift such as scope expansion or architectural changes in `auto` mode; and triggering user inquiries via `report_drift`, supporting approval, rejection, or revision, with decisions written back to the baseline. The plugin provides the `/align` command.