Cancel blocked buy orders like rqalpha

crates/fidc-core/src/broker.rs

@@ -1310,6 +1310,12 @@ where
             .rules
             .can_buy(date, snapshot, candidate, self.execution_price_field);
         if !rule.allowed {
+            let status = match rule.reason.as_deref() {
+                Some("paused")
+                | Some("buy disabled by eligibility flags")
+                | Some("open at or above upper limit") => OrderStatus::Canceled,
+                _ => OrderStatus::Rejected,
+            };
             report.order_events.push(OrderEvent {
                 date,
                 order_id: Some(order_id),
@@ -1317,7 +1323,7 @@ where
                 side: OrderSide::Buy,
                 requested_quantity: requested_qty,
                 filled_quantity: 0,
-                status: OrderStatus::Rejected,
+                status,
                 reason: format!("{reason}: {}", rule.reason.unwrap_or_default()),
             });
             return Ok(());