The fixture accepted in_memory_engine but never actually patched
database.engine or api.app.engine, causing tests to hit the real
SQLite path which fails in CI where data/ doesn't exist.
The crawler subdirectory was the only active project. Moving it to the
repo root simplifies paths and removes the unnecessary nesting. The
vqa/ and immoweb/ directories were legacy/unused and have been removed.
Updated .drone.yml, .gitignore, .claude/ docs, and skills to reflect
the new flat structure.