Replace the in-memory InMemoryStore with a SQLAlchemy-backed
CycloneStore that persists Batch, Claim, Remittance, Match, and
ActivityEvent rows to a configurable DB engine (sqlite by default,
overridable via CYCLONE_DB_URL).
Public API preserved: add / get_batch / iter_claims / iter_remittances
/ distinct_providers / recent_activity. New T10/T12 stubs:
list_unmatched, manual_match, manual_unmatch.
Backward-compat shims for tests that called ._batches.clear() or
acquired ._lock as a context manager.
Idempotency: add() does a per-row session.get(Claim, c.id) (and
s.get(Remittance, ...)) check before each insert; duplicates are
skipped with a warning. This makes re-uploading the same fixture
idempotent instead of raising IntegrityError on the PK.
Auto-init DB fixture (backend/tests/conftest.py) sets
CYCLONE_DB_URL to a per-test sqlite file and calls db.init_db()
once per test, replacing the old module-scoped in-memory fixture.
- iter_claims/iter_remittances now return list[dict] (snapshot under
the lock, return outside) so slow consumers no longer hold the
write lock during iteration
- iter_claims gains payer (case-insensitive substring) and
date_from/date_to filters via the new _date_in_bounds helper
- iter_remittances wires date_from/date_to and payer
- BatchRecord split into BatchRecord837 / BatchRecord835 with
__new__ dispatch so isinstance narrows result correctly,
eliminating the four 'type: ignore[assignment]' band-aids
- BatchRecord now rejects naive parsed_at via model_validator
- to_ui_remittance's adjustmentAmount=0.0 is documented as a
TODO for sub-project 2 reconciliation
151 passed, 1 skipped (no regressions; +6 tests for new filters)
Tyler