Semantic Search MCP

# Changelog All notable changes to this project will be documented in this file. Please choose versions by [Semantic Versioning](http://semver.org/). * MAJOR version when you make incompatible API changes, * MINOR version when you add functionality in a backwards-compatible manner, and * PATCH version when you make backwards-compatible bug fixes. ## v0.2.1 - Add ruff linting and formatting to Makefile - Fix lint errors (ambiguous variable names, strict zip) - Improve pyproject.toml with ruff and mypy config ## v0.2.0 - Add multi-directory support via comma-separated CONTENT_PATH - Add pytest test suite with 11 tests - Add Makefile with test target ## v0.1.1 - Add authorization restrictions to GitHub Actions workflows - Restrict @claude trigger to bborbe and trusted collaborators only ## v0.1.0 - Add semantic search over markdown files using sentence-transformers - Add duplicate/similar note detection - Add MCP server with `search_related` and `check_duplicates` tools - Add auto-updating index with file watcher - Store indexes in temp directory for multi-session isolation