[FEATURE] Retrieve bulkTransfer error reason

[YoshihitoAso]

Is your feature request related to a problem? Please describe.

Currently, the reason for the error when executing bulkTransfer is only output to the log and cannot be retrieved from the API.
We want to retrieve error reasons from the API.

Describe the solution you'd like

I would like to store bulkTransfer error reasons in detail.
Also, I would like to be able to obtain the error reason from the API.