Expose futures account runtime view

crates/fidc-core/src/futures.rs

@@ -353,6 +353,7 @@ impl FuturesPosition {
 
 #[derive(Debug, Clone)]
 pub struct FuturesAccountState {
+    starting_cash: f64,
     total_cash: f64,
     frozen_cash: f64,
     positions: BTreeMap<(String, FuturesDirection), FuturesPosition>,
@@ -361,12 +362,17 @@ pub struct FuturesAccountState {
 impl FuturesAccountState {
     pub fn new(total_cash: f64) -> Self {
         Self {
+            starting_cash: total_cash,
             total_cash,
             frozen_cash: 0.0,
             positions: BTreeMap::new(),
         }
     }
 
+    pub fn starting_cash(&self) -> f64 {
+        self.starting_cash
+    }
+
     pub fn total_cash(&self) -> f64 {
         self.total_cash
     }