fix: add error handling to MCP server tools

feat: MCP server with 6 tools — search, add_document, add_url, list_sources, delete_source, get_stats

fix: quality improvements for ingestion pipeline and search engine

feat: search engine with context enrichment and filtering

feat: ingestion pipeline with atomic rollback and deduplication

feat: smart text chunker with paragraph and sentence awareness

feat: modular file parsers for txt, md, pdf, epub, docx, html, csv, json

feat: Ollama embedding client with health check

feat: ChromaDB vector store with query, filter, and delete

refactor: add type annotations, fixture teardown, count_documents test

feat: SQLite storage layer with full CRUD and stats

feat: project scaffolding with config and dependencies

docs: add detailed implementation plan with 12 tasks

Merge branch 'main' of https://github.com/ayalyakar/Bereans-Study-MCP

Initial commit