dsh-auto-retry: DSH Bounded Fallback Recovery Plugin

`dsh-auto-retry` is a bounded fallback recovery plugin for DeepSeek Harness (DSH), designed to address specific issues after the official retry policy gives up. It primarily handles cases where a relayer mislabels transient rate limiting as balance exhaustion, a request completes normally without visible output, or the output is truncated. By identifying error patterns, implementing an automatic continuation mechanism, and enforcing budget controls, the plugin performs additional retries for errors such as `RATE_LIMIT` and `EMPTY_RESPONSE`, while limiting retry counts and wait times. After installation, `cordis.patch.yml` must be configured. It applies to the DSH Web profile and does not conflict with other global retry plugins.