Refactor code for improved readability and consistency across multiple files

backend/tests/test_review_queue_batch.py

@@ -58,9 +58,7 @@ def category_ids(client: TestClient) -> dict[str, str]:
     )
     assert response.status_code == 200, response.text
     return {
-        item["systemKey"]: item["id"]
-        for item in response.json()
-        if item["systemKey"] is not None
+        item["systemKey"]: item["id"] for item in response.json() if item["systemKey"] is not None
     }