dsh-vorssaint: Write DeepSeek Harness usage and API value to Vorssaint

dsh-vorssaint is a DSH plugin maintained by RGarrido03 that converts DeepSeek Harness's token usage, models, projects, and live runs into a JSONL feed readable by Vorssaint, saving the data to `~/.vorssaint/agents/dsh`. The plugin listens to the session/event stream, creating an append-only file for each session. It maintains counts across restarts and backfills recent usage from DSH logs on the first run. The plugin itself does not include pricing; a USD unit price must be configured per model ID in `cordis.patch.yml` to calculate API value and daily budgets. It only reports tokens and metadata, without writing prompts, tool parameters, outputs, or credentials.