Add futures account model

crates/fidc-core/src/lib.rs

@@ -5,6 +5,7 @@ pub mod data;
 pub mod engine;
 pub mod event_bus;
 pub mod events;
+pub mod futures;
 pub mod instrument;
 pub mod metrics;
 pub mod platform_expr_strategy;
@@ -32,6 +33,7 @@ pub use events::{
     AccountEvent, FillEvent, OrderEvent, OrderSide, OrderStatus, PositionEvent, ProcessEvent,
     ProcessEventKind,
 };
+pub use futures::{FuturesAccountState, FuturesContractSpec, FuturesDirection, FuturesPosition};
 pub use instrument::Instrument;
 pub use metrics::{BacktestMetrics, compute_backtest_metrics};
 pub use platform_expr_strategy::{