dsh-a2a-server: A Plugin for Connecting DeepSeek Harness Agents to the A2A Protocol

`dsh-a2a-server` is a community plugin for DeepSeek Harness (DSH) that exposes local agents to external systems via the A2A protocol. As an inbound server, it provides Agent Card service discovery and JSON-RPC v1.0 bindings, supporting core features such as message sending and task management. Installation requires configuring a web context and supports access from multiple peers. The plugin supports only inbound mode and the A2A v1.0 protocol, providing a standardized interface for DSH agents to integrate with the Agent2Agent ecosystem.