feat(stock-pool): unify target execution, durable intent state and ETF rules

crates/fidc-core/src/strategy.rs

@@ -1070,6 +1070,9 @@ pub enum TargetPortfolioOrderPricing {
 
 #[derive(Debug, Clone)]
 pub enum OrderIntent {
+    StockPool {
+        contract: Box<crate::stock_pool_execution::FrozenStockPoolIntent>,
+    },
     WithTimeInForce {
         intent: Box<OrderIntent>,
         time_in_force: OrderTimeInForce,
@@ -1231,6 +1234,7 @@ pub enum OrderIntent {
 impl OrderIntent {
     fn collect_potential_buy_symbols(&self, open_orders: &[OpenOrderView], symbols: &mut BTreeSet<String>) {
         match self.unwrapped() {
+            Self::StockPool { contract } => { symbols.extend(contract.selection.requested_symbols.iter().cloned()); }
             Self::Shares { symbol, quantity, .. } | Self::LimitShares { symbol, quantity, .. } if *quantity > 0 => { symbols.insert(symbol.clone()); }
             Self::Lots { symbol, lots, .. } | Self::LimitLots { symbol, lots, .. } if *lots > 0 => { symbols.insert(symbol.clone()); }
             Self::TargetShares { symbol, target_quantity, .. } | Self::LimitTargetShares { symbol, target_quantity, .. } if *target_quantity > 0 => { symbols.insert(symbol.clone()); }
@@ -1311,6 +1315,7 @@ impl OrderIntent {
 
     pub fn supports_time_in_force(&self, time_in_force: OrderTimeInForce) -> bool {
         let intent = self.unwrapped();
+        if matches!(intent, Self::StockPool { .. }) { return time_in_force == OrderTimeInForce::Day; }
         if matches!(
             intent,
             Self::CancelOrder { .. }