Fix undefined isCanceled variable

The variable `isCanceled` was not defined in the scope of the `setTimeout` callback within `deleteTransactionCore.ts`, leading to an error. This commit defines `isCanceled` within the scope to resolve the issue.

src/hooks/transactions/transactionOperations/deleteOperation/deleteTransactionCore.ts

@@ -105,14 +105,14 @@ export const useDeleteTransactionCore = (
         pendingDeletionRef.current?.delete(id);
         reject(error);
       }
-    });
       
-    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      // cancel 함수에서 참조할 수 있도록 클로저로 isCanceled 변수 노출
       (promiseObj as any).cancel = () => {
         isCanceled = true;
         pendingDeletionRef.current?.delete(id);
         console.log('트랜잭션 삭제 작업 취소 완료');
       };
+    });
     
     return promiseObj;
   }, [transactions, setTransactions, user]);