v0.5.0 — local MCP server

• New docsift mcp runs DocSift as a local MCP
  server over stdio, for Claude Desktop, Claude Code, Codex, Cursor and other MCP
  clients. Install it with the new mcp extra.

  Two tools: search_document takes a file path and a question and returns only
  the matching passages with page and section metadata, converting the file the
  first time it is seen; convert_document converts and indexes a file and
  returns a summary rather than its text. Neither returns a whole document —
  that would put it in the model's context and undo the point.

  The server runs in your own process. Nothing listens on a port and no document
  content crosses the network.