V4.2 complete

tests/conftest.py

@@ -4,6 +4,8 @@ Every test gets a fresh in-memory SQLite database so tests are
 isolated, fast, and leave no artifacts on disk.
 """
 
+from pathlib import Path
+
 import pytest
 import pytest_asyncio
 from sqlmodel import Session
@@ -12,7 +14,7 @@ from sqlmodel import create_engine
 from sqlmodel.pool import StaticPool
 
 from transcription.config import Settings
-from transcription.config import get_settings
+from transcription.config import SqliteSettings
 from transcription.db.engine import get_database_url
 from transcription.db.engine import get_engine
 from transcription.db.session import dispose_session_factory
@@ -37,10 +39,17 @@ def session():
 
 
 @pytest_asyncio.fixture
-async def default_settings():
+async def default_settings(tmp_path):
     """Provide default settings for tests."""
-    settings = get_settings(database_url="sqlite:///:memory:")
+    database_path = tmp_path / "tests.db"
+    settings = Settings(
+        openrouter_api_key="test-key",
+        database=SqliteSettings(path=str(database_path)),
+        environment="test",
+    )
     db_url = get_database_url(settings)
+    if Path(str(get_engine(database_url=db_url).url.database)).resolve() != database_path.resolve():
+        raise RuntimeError(f"Refusing to initialize destructive test fixtures against {db_url}")
     await dispose_session_factory(db_url)
     engine = get_engine(database_url=db_url)