dsh-llm-codex-auth-native-compact-image: DeepSeek Harness Codex Subscription Integration and Native Compression Plugin

This plugin connects a ChatGPT Codex subscription to DeepSeek Harness (DSH) via an OAuth flow and registers it as the `codex-oauth` model provider. Core features include native context compression, multi-turn conversation support, image input, secure credential storage, and usage monitoring. Installation requires the `file:` prefix. The plugin resolves context overflow in multi-turn conversations, but note that using undocumented APIs may violate OpenAI's Terms of Service.