Function reconcile_order_report 

pub fn reconcile_order_report(
    order: &OrderAny,
    report: &OrderStatusReport,
    instrument: Option<&InstrumentAny>,
    ts_now: UnixNanos,
) -> Option<OrderEventAny>

Reconciles an order with a venue status report, generating appropriate events.

This is the core reconciliation logic that handles all order status transitions. For fill reconciliation with inferred fills, use reconcile_order_with_fills.