dsh-factory: A Dependency Graph Task Factory for DeepSeek Harness

`dsh-factory` is a control-plane plugin for DeepSeek Harness, designed to address state management and concurrent execution in complex workflows. It provides dependency graphs, secure checkout lanes, scheduled execution, and automatic retries, while supporting task persistence and collaboration. Once installed, Factory manages task queues, workflow orchestration, and reviews through a sidebar, ensuring safe and non-interfering Agent execution for scenarios that require structured task management.