事件源聚合根是否可以访问事件源存储库?

我正在研究 event-sourced CQR实现,在应用程序/域层使用DDD。我有一个这样的对象模型:

public class Person : AggregateRootBase
{
    private Guid? _bookingId;

    public Person(Identification identification)
    {
        Apply(new PersonCreatedEvent(identification));
    }

    public Booking CreateBooking() {
        // Enforce Person invariants
        var booking = new Booking();
        Apply(new PersonBookedEvent(booking.Id));
        return booking;
    }

    public void Release() {
        // Enforce Person invariants
        // Should we load the booking here from the aggregate repository?
        // We need to ensure that booking is released as well.
        var booking = BookingRepository.Load(_bookingId);
        booking.Release();
        Apply(new PersonReleasedEvent(_bookingId));
    }

    [EventHandler]
    public void Handle(PersonBookedEvent @event) { _bookingId = @event.BookingId; }

    [EventHandler]
    public void Handle(PersonReleasedEvent @event) { _bookingId = null; }
}

public class Booking : AggregateRootBase
{
    private DateTime _bookingDate;
    private DateTime? _releaseDate;

    public Booking()
    {
        //Enforce invariants
        Apply(new BookingCreatedEvent());
    }

    public void Release() 
    {
        //Enforce invariants
        Apply(new BookingReleasedEvent());
    }

    [EventHandler]
    public void Handle(BookingCreatedEvent @event) { _bookingDate = SystemTime.Now(); }
    [EventHandler]
    public void Handle(BookingReleasedEvent @event) { _releaseDate = SystemTime.Now(); }
    // Some other business activities unrelated to a person
}

根据我目前对DDD的理解,个人和预订都是分开的,原因有两个:

1. 有时业务组件将从数据库中单独提取预订对象。(即,由于信息不正确,已发布的人员已修改了以前的预订)。
2. 每当需要更新预订时,人员和预订之间不应该存在锁定争用。

另一个业务要求是,一个人每次不能预订超过一次。因此,我关心的是在读取端查询查询数据库,因为那里可能存在一些不一致性(由于使用了CQR并拥有最终一致的读取数据库)。

是否应允许聚合根按ID查询对象的事件源备份存储区(根据需要延迟加载它们)?有没有其他更合理的实施途径?