CI: drop outer transaction/savepoint, brug per-test cleanup i stedet

backend/tests/conftest.py

@@ -36,42 +36,36 @@ async def engine():
 
 @pytest_asyncio.fixture
 async def session(engine):
-    """Per-test database session med transaction rollback.
+    """Per-test database session.
 
-    Hver test får sin egen connection med en ydre transaction.
-    commit() inde i testen opretter en savepoint (via create_savepoint),
-    så al data rulles tilbage efter testen — ingen krydskontaminering.
+    Data commited her er synlig for appens egen session via HTTP client.
+    Renses automatisk af _clean_db efter hver test.
     """
-    conn = await engine.connect()
-    transaction = await conn.begin()
-    maker = async_sessionmaker(
-        bind=conn,
-        expire_on_commit=False,
-        join_transaction_mode="create_savepoint",
-    )
+    maker = async_sessionmaker(bind=engine, expire_on_commit=False)
     async with maker() as s:
         yield s
-    await transaction.rollback()
-    await conn.close()
+
+
+@pytest_asyncio.fixture(autouse=True)
+async def _clean_db(engine):
+    """Slet alt data fra alle tabeller efter hver test."""
+    yield
+    async with engine.begin() as conn:
+        for table in reversed(Base.metadata.sorted_tables):
+            await conn.execute(table.delete())
 
 
 @pytest_asyncio.fixture
-async def client(session):
-    """HTTP client with injected test DB session."""
-
-    async def override_get_db():
-        yield session
-
-    app.dependency_overrides[get_db] = override_get_db
+async def client():
+    """HTTP client — appen bruger sin egen DB session via get_db()."""
     transport = ASGITransport(app=app)
     async with AsyncClient(transport=transport, base_url="http://test") as ac:
         yield ac
-    app.dependency_overrides.clear()
 
 
 @pytest_asyncio.fixture
 async def admin_user(session):
-    """Insert admin user into test DB (rulles tilbage af session-fixture)."""
+    """Insert admin user into test DB (ryddes af _clean_db)."""
     u = User(
         username="admin",
         password_hash=hash_password("admin123"),
@@ -84,7 +78,7 @@ async def admin_user(session):
 
 @pytest_asyncio.fixture
 async def normal_user(session):
-    """Insert normal user into test DB (rulles tilbage af session-fixture)."""
+    """Insert normal user into test DB (ryddes af _clean_db)."""
     u = User(
         username="testuser",
         password_hash=hash_password("test123"),