Get all the pending saga of a given type

[paolofulgoni]

What about adding a method to get all the pending saga of a given type?

Something like this:

    public interface ISagaStateRepository
    {
        // ...

        Task<IEnumerable<ISagaState>> ReadPendingAsync(Type type);
        // or...
        Task<IEnumerable<ISagaState>> ReadAsync(Type type, SagaStates state);
    }