Two fixtures created a temporary index directory and pointed INDEX_DIR at it, and paperless_dirs did the same, so a test that requested more than one got whichever assignment ran last. The search conftest no longer defines its own index_dir fixture, the tests that took it read paperless_dirs.index_dir instead, and _search_index is now a thin wrapper that requests paperless_dirs. The fixture that yields a Document is renamed from indexed_document to searchable_document so it no longer differs by one character from the index_document factory next to it.
* Feature: parse advanced search with whoosh-compat and delete the hand-written translator
* Don't cover these, they exist for defensive, but there's no other current diagnostic
* A mix of more no cover and tests
* Route SCHEMA_FIELD_MISSING into an error, not an HTTP 400
Trenton H