test: cover KIS pagination consumer seams

tests/adapters/broker/test_ownership.py

@@ -92,7 +92,24 @@ def test_strategy_quantity_above_raw_broker_total_fails_closed(tmp_path):
     assert exc.value.code == "ownership_mismatch"
 
 
-def test_projection_includes_strategy_symbol_alongside_first_page_manual_holding(tmp_path):
+def _paged_kis_for_ownership(kis_balance_broker_factory, strategy_qty):
+    return kis_balance_broker_factory([
+        {
+            "rows": [{"pdno": "005930", "hldg_qty": "19"}],
+            "tr_cont": "F",
+            "fk": "A",
+            "nk": "1",
+        },
+        {
+            "rows": [{"pdno": "000660", "hldg_qty": str(strategy_qty)}],
+            "tr_cont": "E",
+        },
+    ])
+
+
+def test_projection_includes_strategy_symbol_from_actual_later_kis_page(
+    tmp_path, kis_balance_broker_factory
+):
     store = StrategyOwnershipStore(tmp_path / "ownership.json")
     store.apply_fill(
         execution_id="buy-1",
@@ -100,12 +117,32 @@ def test_projection_includes_strategy_symbol_alongside_first_page_manual_holding
         side="buy",
         quantity=4,
     )
-    broker = OwnershipAwareBroker(
-        FakeBroker([BalanceItem("005930", 19), BalanceItem("000660", 4)]),
-        store,
-    )
+    delegate, calls = _paged_kis_for_ownership(kis_balance_broker_factory, 4)
+    broker = OwnershipAwareBroker(delegate, store)
 
     assert broker.get_balance() == [BalanceItem("000660", 4)]
+    assert len(calls) == 2
+    assert "tr_cont" not in calls[0]["headers"]
+    assert calls[1]["headers"]["tr_cont"] == "N"
+
+
+def test_projection_detects_mismatch_from_actual_later_kis_page(
+    tmp_path, kis_balance_broker_factory
+):
+    store = StrategyOwnershipStore(tmp_path / "ownership.json")
+    store.apply_fill(
+        execution_id="buy-1",
+        symbol="000660",
+        side="buy",
+        quantity=4,
+    )
+    delegate, calls = _paged_kis_for_ownership(kis_balance_broker_factory, 3)
+    broker = OwnershipAwareBroker(delegate, store)
+
+    with pytest.raises(BrokerBalanceError) as exc:
+        broker.get_balance()
+    assert exc.value.code == "ownership_mismatch"
+    assert len(calls) == 2
 
 
 def test_sell_cannot_reduce_below_strategy_owned_zero(tmp_path):