feat: add bounded KIS account read recovery

tests/application/test_execution.py

@@ -8,6 +8,7 @@ from __future__ import annotations
 from trex_core.adapters.broker.paper import PaperBroker
 from trex_core.adapters.persistence.in_memory_intent_store import InMemoryIntentStore
 from trex_core.application.broker_port import (
+    BalanceItem,
     CancelOutcome,
     CancelState,
     FillStatus,
@@ -182,6 +183,37 @@ def test_full_sell_qty_is_broker_balance():
     assert repo.fetch_slot(sid).status is SlotState.INACTIVE  # full exit
 
 
+def test_pending_sell_uses_injected_bounded_balance_reader():
+    class LiveReadFailPaper(PaperBroker):
+        fail_live_balance = False
+
+        def get_balance(self):
+            if self.fail_live_balance:
+                raise AssertionError("raw balance reader must not be called")
+            return super().get_balance()
+
+    broker = LiveReadFailPaper(fill_after_polls=0)
+    repo, svc, intents, execution = _wire(broker)
+    sid = _buy(intents, qty=10).slot_id
+    execution.run_once()
+    svc.sell(sid, actor="t", reason="full")
+    broker.fail_live_balance = True
+    broker._fill_after = 5
+
+    snapshot_execution = ExecutionService(
+        svc,
+        repo,
+        broker,
+        instance_key=INST,
+        balance_reader=lambda: [BalanceItem("005931", 10)],
+    )
+    snapshot_execution.run_once()
+
+    sell_orders = [o for o in broker._orders.values() if o.side == "sell"]
+    assert len(sell_orders) == 1 and sell_orders[0].qty == 10
+    assert repo.fetch_slot(sid).status is SlotState.PENDING_SELL
+
+
 def test_partial_sell_qty_is_min_intent_broker():
     """dcy-021/REQ-062 (D4): partial sell dispatches min(intent qty, broker);
     remainder stays holding (broker-authoritative qty), cost basis preserved."""