feat: add bounded KIS account read recovery

trex_core/application/execution.py

@@ -30,6 +30,7 @@ from typing import Callable, Optional
 
 from trex_core.application.alarm_emitter import AlarmEmitter
 from trex_core.application.broker_port import (
+    BalanceItem,
     BrokerPort,
     CancelOutcome,
     CancelState,
@@ -84,6 +85,7 @@ class ExecutionService:
         stale_pending_threshold_sec: Optional[int] = None,
         instance_key: str = "default",
         alarm_emitter: Optional[AlarmEmitter] = None,
+        balance_reader: Optional[Callable[[], list[BalanceItem]]] = None,
     ) -> None:
         self._svc = slot_service
         self._repo = repo
@@ -104,6 +106,10 @@ class ExecutionService:
         )
         # dcy-033 / REQ-100: best-effort alarm emitter (None = no alarms sent).
         self._alarm_emitter = alarm_emitter
+        # dcy-041 / GitHub #45: pending-sell quantity may use a bounded
+        # account snapshot only through this injected reader. Reconciliation
+        # remains wired directly to the live broker.
+        self._sell_dispatch_balance_reader = balance_reader or broker.get_balance
 
     # ------------------------------------------------------------
     def run_once(self) -> ExecutionResult:
@@ -136,7 +142,7 @@ class ExecutionService:
                 # surfaces via reconcile_core_holdings (REQ-062 A). No mirror
                 # fallback by design.
                 if sell_balance is None:
-                    sell_balance = self._balance_map()
+                    sell_balance = self._sell_dispatch_balance_map()
                 bal = sell_balance.get(slot.symbol or "", 0)
                 # dcy-021 / REQ-062 (D4): full sell (slot.qty is None) => broker
                 # balance; partial sell => min(order qty, broker balance). Broker
@@ -313,6 +319,13 @@ class ExecutionService:
         """Current broker balance as {symbol: hldg_qty} (REQ-062 ground truth)."""
         return {b.symbol: int(b.hldg_qty) for b in self._broker.get_balance()}
 
+    def _sell_dispatch_balance_map(self) -> dict:
+        """Balance used only to size a not-yet-submitted pending sell."""
+        return {
+            b.symbol: int(b.hldg_qty)
+            for b in self._sell_dispatch_balance_reader()
+        }
+
     def _resolve_fill_price(self, fs, slot) -> tuple[float | None, bool]:
         """Resolve the fill price from FillStatus, with limit_price backfill.