dsh-lost-and-found: Local File Memory Indexing Plugin

`dsh-lost-and-found` is a local file memory indexing plugin for DeepSeek Harness, maintained by `wangzhanchao883`. The plugin builds SQLite indexes by scanning specified directories, supporting multi-dimensional retrieval via natural language, keywords, and time, as well as image description. It features incremental scanning, real-time fallback, and read-only mode, stores all data locally, and does not rely on the cloud. Installation requires the `web` profile, and full-text document content retrieval is currently not supported.