Wire futures order intents into engine

crates/fidc-core/src/broker.rs

@@ -939,6 +939,16 @@ where
                 ));
                 Ok(())
             }
+            OrderIntent::Futures { intent } => {
+                report.diagnostics.push(format!(
+                    "engine_futures_intent_skipped symbol={} direction={} effect={} reason={}",
+                    intent.symbol,
+                    intent.direction.as_str(),
+                    intent.effect.as_str(),
+                    intent.reason
+                ));
+                Ok(())
+            }
         }
     }