DeepSeek Harness (DSH) Plugin: leaves615/dsh-llm-ctl

`leaves615/dsh-llm-ctl` is a plugin for DeepSeek Harness (DSH), designed to address rate limiting, retries, and model management challenges in LLM calls. Its core features include: managing Provider concurrency through strict FIFO rate limiting and an exponential backoff policy; providing fallback retries when no retry plugin is installed; and supporting persistent hidden models and upstream manifest refresh. The plugin runs with process permissions, must be installed in the DSH Web Profile environment, and requires a service restart, making it suitable for developers who need fine-grained control over LLM invocation flows.