- Add `Update` section covering uv tool upgrade / uvx refresh / dev-install
- Fix Quickstart anchor link (heading changed from 5min to 2min in v0.4.0)
- Correct MCP badge (1.0+ matches pyproject `mcp>=1.0,<2.0`)
- Add MongoDB snippet to Quickstart config example
- Refresh Docs table: setup-db-readonly now covers DuckDB/ClickHouse/Mongo;
  add benchmarks.md entry
- Project Layout: list cli.py + audit_cli.py, soften the <200 LOC claim
- Bump 0.4.0 -> 0.4.1