feat: paginate KIS balance inquiries

tests/application/test_holding_divergence.py

@@ -3,7 +3,9 @@ from __future__ import annotations
 
 from dataclasses import replace
 
-from trex_core.application.broker_port import BalanceItem
+import pytest
+
+from trex_core.application.broker_port import BalanceItem, BrokerBalanceError
 from trex_core.application.portfolio import InMemoryReconcileWarningStore
 from trex_core.application.reconciliation import reconcile_core_holdings
 from trex_core.domain.slot import SlotService, SlotState
@@ -24,6 +26,11 @@ class FakeBroker:
         return list(self._b)
 
 
+class FailingBroker(FakeBroker):
+    def get_balance(self):
+        raise BrokerBalanceError("malformed_response")
+
+
 def _hold(repo, svc, pid, symbol, qty):
     repo.reconcile_universe(INST, {pid: "SYM"})
     slot = repo.find_slot_by_portfolio(INST, pid)
@@ -77,6 +84,21 @@ def test_ok_when_qty_matches():
     assert d[str(slot.slot_id)] == "ok"
 
 
+def test_later_page_snapshot_symbol_keeps_holding_slot_ok():
+    repo, svc = _wire()
+    slot = _hold(repo, svc, "pf-later", "000660", 4)
+
+    decisions = reconcile_core_holdings(
+        slot_repo=repo,
+        slot_service=svc,
+        broker=FakeBroker([BalanceItem(symbol="000660", hldg_qty=4)]),
+        instance_key=INST,
+    )
+
+    assert decisions == {str(slot.slot_id): "ok"}
+    assert repo.fetch_slot(slot.slot_id).status is SlotState.HOLDING
+
+
 def test_B_broker_holds_unmanaged_warns():
     repo, svc = _wire()
     broker = FakeBroker([BalanceItem(symbol="000660", hldg_qty=5)])  # core has none
@@ -149,3 +171,18 @@ def test_other_instance_only_managed_slot_remains_unmanaged_position_without_wri
     assert repo.update_calls == writes_before
     assert warn_store.list_warned() == set()
     assert repo.list_slots(INST) == []
+
+
+def test_reconcile_core_holdings_propagates_balance_failure_without_slot_write():
+    repo, svc = _wire()
+    slot = _hold(repo, svc, "pf-a", "005930", 10)
+
+    with pytest.raises(BrokerBalanceError, match="malformed_response"):
+        reconcile_core_holdings(
+            slot_repo=repo,
+            slot_service=svc,
+            broker=FailingBroker([]),
+            instance_key=INST,
+        )
+
+    assert repo.fetch_slot(slot.slot_id).status is SlotState.HOLDING