receive

Receive order, routing each of its demands to a per-demand filler. Steps (matching Java's OrderFillerAbstract.receive):

1. If unavailable, reject the order with OrderStatusCode.FillerUnavailable.

2. Assign a DemandFillerIfc to each demand via demandFillerFinder; throw NoDemandFillerFoundException if any demand has no eligible filler.

3. Compute the order's status via determineOrderStatus; if any demand will be rejected, reject the order.

4. Otherwise, ask the order to begin batched receipt.