@amphilagus/dsh-literature: DeepSeek Harness Literature Retrieval and Targeted Tracking Plugin

`@amphilagus/dsh-literature` is a literature retrieval and tracking plugin within the DSH ecosystem. It requires the "Literature Tracking Assistant" preset and is not loaded by default in standard coding sessions. Its core functions include retrieving topics or researchers (requiring ORCID) via Crossref and arXiv; writing results to a new global SQLite database after manual grading; and providing session-level expiry reminders and continuous tracking based on a schedule. The plugin registers three runtime skills—`literature-survey`, `literature-tracking-setup`, and `literature-tracking-search`—and supports search caching, researcher profile management, and SCI journal directory queries.