fix(command): correct aggregate ID assignment of groups (#11725)

# Which Problems Are Solved

The group write model used the `event.ID` field instead of
`event.Aggregate().ID` as aggregate id.

# How the Problems Are Solved

replaced `event.ID` with `event.Aggregate().ID`

internal/command/group_model.go

@@ -59,7 +59,7 @@ func (g *GroupWriteModel) Reduce() error {
 	for _, event := range g.Events {
 		switch e := event.(type) {
 		case *group.GroupAddedEvent:
-			g.AggregateID = e.ID
+			g.AggregateID = e.Aggregate().ID
 			g.Name = e.Name
 			g.Description = e.Description
 			g.State = domain.GroupStateActive