add reservations to the model

cmd/cart/pool-server.go

@@ -23,6 +23,7 @@ import (
 	"go.opentelemetry.io/contrib/bridges/otelslog"
 	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
 	"google.golang.org/protobuf/types/known/anypb"
+	"google.golang.org/protobuf/types/known/timestamppb"
 
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/attribute"
@@ -304,7 +305,7 @@ func (s *PoolServer) HandleReservations(ctx context.Context, cartId cart.CartId,
 		}
 		logger.InfoContext(ctx, "reserved item", "sku", item.Sku, "location", string(locationId), "expires at", end.String())
 		span.End()
-		item.ReservationEndsTime = end
+		item.ReservationEndTime = timestamppb.New(end)
 	}
 	return nil
 }