Adds dedicated result-level tests, each indexing real documents and
asserting on matched-ID sets rather than parse shape:
- Deferred `-term` negation (G1): bare `-taxes` requires the term, and
fielded `-title:alpha` drops the negation entirely, both matching v2.
- Reversed date ranges: absolute bounds swap (whoosh parity); relative
`now±` bounds day-bump instead, an inconsistency pinned as a
whoosh-compat follow-up rather than "fixed" locally.
- The six whoosh unit abbreviations (yrs/mos/wks/hrs/mins/secs).
- Unterminated `[` date range brackets 400 at the API level.
- `tag:foo,bar` comma value lists are conjunctive, with a decoy proving
`correspondent:foo,bar` is not treated as a list.
- Date keyword phrases (`today`) honour the active (non-UTC) timezone,
not just relative ranges.
- `_DEFAULT_SEARCH_FIELDS` stays a subset of PUBLIC_FIELDS.
- Every declared JSON subpath is actually written at index time.
Also replaces test_schema.py::TestFastFlagAgreement's tantivy-py
__reduce__() pickling probe with one built on the paperless-owned,
tantivy-independent field_descriptors().
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
