galvanize-dsh: Enable DSH Agent to Proactively Wake Up Conversations via Events

`galvanize-dsh` is a native plugin for DeepSeek Harness designed to replace traditional polling-based patterns with an event-driven architecture. It listens for events—such as files, emails, and webhooks—via the Galvanize core and automatically wakes headless DSH sessions to process tasks. The plugin provides tools such as `trigger_add`, `trigger_list`, `trigger_test`, and `trigger_remove`, and supports configuration through CLI commands and natural language instructions. Environmental requirements must be met before installation; after installation, the plugin automatically verifies connectivity and interacts with the core API to enable automated processing.