The same per-test sqlite-engine setup was duplicated across 14 test
files (~30 lines each). Consolidated into a single async fixture
`db_factory` in tests/conftest.py; tests now take db_factory as a
parameter and use `async with db_factory() as session` directly.
No behaviour change — same function-scope, same in-memory schema
created via Base.metadata.create_all, same app.db._engine /
_session_factory rebinding so module-level helpers see the test
engine. Just ~420 lines of boilerplate removed.
- pyproject already sets asyncio_mode=auto, so async def tests are
collected as async automatically. Removed the redundant decorator
from four files (test_i18n, test_llm_csv_parser, test_ticker_validate,
test_localization_integration); the bare async def is enough.
- StrategicLogTranslation.log_id used the _PK autoincrement type for
a non-PK FK column. Replaced with a portable BigInteger that emits
Integer on SQLite and BigInteger elsewhere — matches the migration's
sa.BigInteger() declaration.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
