Legacy tests archived after the Step 4 acquisition refactor.

These tests protected the old local-demo SQLite/search/query-demo paths:

- `test_store.py`
- `test_creation_search.py`
- `test_query.py`

They are intentionally outside `tests/` so the default formal test suite does
not keep treating SQLite, `data/queries/creation_demo.json`, or
`scripts/run_creation_search.py` as the mainline contract. Use the `local-demo`
branch or this archive when investigating legacy behavior.
