fix: persist uncertain cancel outcomes

trex_core/domain/slot/in_memory_repository.py

@@ -219,6 +219,29 @@ class InMemorySlotRepository:
         )
         return True
 
+    def mark_cancel_outcome(
+        self,
+        slot_id: UUID,
+        broker_order_id: str,
+        state: str,
+    ) -> bool:
+        """Persist one cancel attempt iff the same order is still pending."""
+        s = self._slots.get(slot_id)
+        if (
+            s is None
+            or s.broker_order_id != broker_order_id
+            or s.status not in self._PENDING
+        ):
+            return False
+        now = datetime.now(tz=timezone.utc)
+        self._slots[slot_id] = replace(
+            s,
+            cancel_state=state,
+            cancel_requested_at=now,
+            updated_at=now,
+        )
+        return True
+
     def list_dispatched_pending(self, instance_key: str = "default") -> list[Slot]:
         """Pending slots already dispatched (broker_order_id NOT NULL) — poll targets."""
         return [
@@ -236,7 +259,11 @@ class InMemorySlotRepository:
         s = self._slots.get(slot_id)
         if s is not None:
             self._slots[slot_id] = replace(
-                s, broker_order_id=None, updated_at=datetime.now(tz=timezone.utc)
+                s,
+                broker_order_id=None,
+                cancel_state=None,
+                cancel_requested_at=None,
+                updated_at=datetime.now(tz=timezone.utc),
             )
 
     # --- bulk counts ---

trex_core/domain/slot/models.py

@@ -59,6 +59,11 @@ class Slot:
     # Order venue carried from the admitted intent through dispatch/cancel.
     # It is reset to KRX when the permanent asset slot returns to INACTIVE.
     venue: str = "KRX"
+    # Immediate cancel-request result. The slot remains pending until fill
+    # polling confirms cancelled/filled. Persisted to prevent blind retries
+    # across ticks and restarts.
+    cancel_state: Optional[str] = None
+    cancel_requested_at: Optional[datetime] = None
 
 
 # Canonical column contract for `Slot` (dcy-001 OQ-2 / FR-5).
@@ -88,6 +93,8 @@ EXPECTED_SLOT_FIELDS: frozenset[str] = frozenset({
     "slippage_pct",       # dcy-022 / REQ-068 (BAT-032)
     "occupancy_seq",      # dcy-028 / REQ-081 (BAT-042)
     "venue",
+    "cancel_state",
+    "cancel_requested_at",
 })
 
 

trex_core/domain/slot/service.py

@@ -205,6 +205,8 @@ class SlotService:
                 timeout_sec=None,
                 slippage_pct=None,
                 venue="KRX",
+                cancel_state=None,
+                cancel_requested_at=None,
                 updated_at=datetime.now(tz=timezone.utc),
             )
 
@@ -277,6 +279,8 @@ class SlotService:
             slippage_pct=new_slippage_pct,
             occupancy_seq=new_occupancy_seq,
             venue=new_venue,
+            cancel_state=None,
+            cancel_requested_at=None,
             updated_at=datetime.now(tz=timezone.utc),
         )