dsh-llm-gateway-compat: OpenAI-Compatible Gateway Adapter for DeepSeek Harness

`dsh-llm-gateway-compat` is an unofficial, community-maintained plugin designed to address compatibility issues when DeepSeek Harness (DSH) integrates with OpenAI-compatible gateways. Its main features include: mitigating the risk of tool call IDs being overwritten during streaming output, handling specific 400 errors with automatic recovery attempts, and supporting Chat Completions routing. Installation requires DSH version 0.1.5-rc.1 or higher, and configuration must be edited manually in `settings.yaml`. Developers should note that the plugin is not officially maintained and has limitations, such as rejecting image inputs.