fix: persist uncertain cancel outcomes

tests/application/test_venue_intent_flow.py

@@ -4,7 +4,14 @@ from __future__ import annotations
 from uuid import UUID
 
 from trex_core.adapters.persistence.in_memory_intent_store import InMemoryIntentStore
-from trex_core.application.broker_port import BalanceItem, FillStatus, OrderAck, OrderRequest
+from trex_core.application.broker_port import (
+    BalanceItem,
+    CancelOutcome,
+    CancelState,
+    FillStatus,
+    OrderAck,
+    OrderRequest,
+)
 from trex_core.application.execution import ExecutionService
 from trex_core.application.intents import BuyIntent, IntentService
 from trex_core.application.messaging import RpcRequest
@@ -38,9 +45,9 @@ class RecordingBroker:
         symbol: str,
         qty: int,
         venue: str = "KRX",
-    ) -> bool:
+    ) -> CancelOutcome:
         self.cancel_venues.append(venue)
-        return True
+        return CancelOutcome(CancelState.REQUESTED)
 
     def get_balance(self) -> list[BalanceItem]:
         return []