mnemosyne-mcp v0.2.0

Federated search, new tools, and bug fixes.

New Tools

• search_docs -- document-only search
• schema_ingest -- DDL/JSON/SQLite schema ingestion
• schema_stats -- schema index statistics

Fixes

• Per-partition truncation (docs no longer silently dropped)
• Stats handler crash fix
• Document TF-IDF vocabulary wiring