Expose open order state to strategy runtime

crates/bt-demo/src/main.rs

@@ -123,6 +123,7 @@ fn main() -> Result<(), Box<dyn Error>> {
                     decision_index: 1,
                     data: &data,
                     portfolio: &PortfolioState::new(10_000_000.0),
+                    open_orders: &[],
                 })?;
                 eprintln!("DEBUG notes={:?}", decision.notes);
                 eprintln!("DEBUG diagnostics={:?}", decision.diagnostics);