Align order costs and rebalance priority with rqalpha

crates/fidc-core/src/engine.rs

@@ -6,7 +6,7 @@ use crate::broker::{BrokerExecutionReport, BrokerSimulator};
 use crate::cost::CostModel;
 use crate::data::{BenchmarkSnapshot, DataSet, DataSetError, PriceField};
 use crate::events::{AccountEvent, FillEvent, OrderEvent, OrderSide, OrderStatus, PositionEvent};
-use crate::metrics::{compute_backtest_metrics, BacktestMetrics};
+use crate::metrics::{BacktestMetrics, compute_backtest_metrics};
 use crate::portfolio::{CashReceivable, HoldingSummary, PortfolioState};
 use crate::rules::EquityRuleHooks;
 use crate::strategy::{Strategy, StrategyContext};
@@ -574,6 +574,7 @@ where
             notes.push(reason.clone());
             report.order_events.push(OrderEvent {
                 date,
+                order_id: None,
                 symbol: symbol.clone(),
                 side: OrderSide::Sell,
                 requested_quantity: quantity,
@@ -583,6 +584,7 @@ where
             });
             report.fill_events.push(FillEvent {
                 date,
+                order_id: None,
                 symbol: symbol.clone(),
                 side: OrderSide::Sell,
                 quantity,