Add rqalpha-style order reject lifecycle events

crates/fidc-core/tests/explicit_order_flow.rs

@@ -648,7 +648,7 @@ fn broker_cancels_buy_when_open_hits_upper_limit() {
             .contains("open at or above upper limit")
     );
     assert!(report.process_events.iter().any(|event| {
-        event.kind == ProcessEventKind::OrderUnsolicitedUpdate
+        event.kind == ProcessEventKind::OrderCreationReject
             && event.symbol.as_deref() == Some("000002.SZ")
             && event.side == Some(fidc_core::OrderSide::Buy)
     }));
@@ -2974,6 +2974,43 @@ fn broker_cancels_open_order_by_order_id() {
     assert!(portfolio.position("000002.SZ").is_none());
 }
 
+#[test]
+fn broker_emits_cancellation_reject_for_unknown_order() {
+    let day1 = NaiveDate::from_ymd_opt(2024, 1, 10).unwrap();
+    let data = two_day_limit_order_data(10.0, 10.1);
+    let broker = BrokerSimulator::new_with_execution_price(
+        ChinaAShareCostModel::default(),
+        ChinaEquityRuleHooks::default(),
+        PriceField::Open,
+    );
+    let mut portfolio = PortfolioState::new(1_000_000.0);
+
+    let report = broker
+        .execute(
+            day1,
+            &mut portfolio,
+            &data,
+            &StrategyDecision {
+                rebalance: false,
+                target_weights: BTreeMap::new(),
+                exit_symbols: BTreeSet::new(),
+                order_intents: vec![OrderIntent::CancelOrder {
+                    order_id: 999_999,
+                    reason: "user_cancel".to_string(),
+                }],
+                notes: Vec::new(),
+                diagnostics: Vec::new(),
+            },
+        )
+        .expect("cancel reject execution");
+
+    assert!(report.order_events.is_empty());
+    assert!(report.fill_events.is_empty());
+    assert!(report.process_events.iter().any(|event| {
+        event.kind == ProcessEventKind::OrderCancellationReject && event.order_id == Some(999_999)
+    }));
+}
+
 #[test]
 fn broker_reserves_sellable_quantity_for_open_limit_sells() {
     let date = NaiveDate::from_ymd_opt(2024, 1, 10).unwrap();