style: apply ruff format to T6 inference aggregation

tests/unit/test_inference_pair_aggregate.py

@@ -268,9 +268,7 @@ class TestRunInferencePairEndToEnd:
     """run_inference pair 端到端：逐题落库不变 + unit 级聚合。"""
 
     @pytest.mark.asyncio
-    async def test_pair_predictions_persisted_per_question(
+    async def test_pair_predictions_persisted_per_question(self, harness_log: HarnessLog) -> None:
-        self, harness_log: HarnessLog
-    ) -> None:
         """pair 两题各自逐题落 predictions（保留逐题溯源），聚合按 unit。"""
         llm = AsyncMock()
         llm.chat.return_value = _make_llm_response(answer="B")
@@ -301,18 +299,14 @@ class TestRunInferencePairEndToEnd:
         assert qids == {"po", "pm"}
 
     @pytest.mark.asyncio
-    async def test_orphan_pair_excluded_single_survives(
+    async def test_orphan_pair_excluded_single_survives(self, harness_log: HarnessLog) -> None:
-        self, harness_log: HarnessLog
-    ) -> None:
         """run_inference 中孤儿 pair 被剔除、single 仍计入。"""
         llm = AsyncMock()
         llm.chat.return_value = _make_llm_response(answer="B")
 
         questions = [
             _make_question("s1", answer="B"),
-            _make_question(
+            _make_question("po", answer="B", pair_id="orphan", question_role="pair_original"),
-                "po", answer="B", pair_id="orphan", question_role="pair_original"
-            ),
         ]
         result = await run_inference(
             questions,