Missing Credit items? Client REST API

[jgulledge19]

What were you trying to do?

Using v0.9.5 .exe on Windows 11 to create a x937 file of scanned in checks to send to bank to deposit. Creating the file via the client REST API and save it as a .x937 file extension and send to bank. The credit related details are missing. Also I see type 61, but nothing is in the client REST for this, can that be added to the client REST API and docs? Related: #249, #247, #321

What did you expect to see?

Credit items added to the icl/x937 file, but they are missing.

What did you see?

Working file with no credit items. I have reviewed in both: X9Assist and MavBridge X9 Analyzer

How can we reproduce the problem?

As of 2023-12-20, the example here: https://moov-io.github.io/imagecashletter/api/#post-/files/create has creditItems in the JSON. Using Postman, take that JSON and a POST /files/create method and then retrieve the data via GET /files/{fileID}. It does not have credit items. Then get the contents and save the icl via the GET /files/{fileID}/contents and save to Downloads as test-icl.x937. Open the created file in X9Assist and/or MavBridge X9 Analyzer and there are no credit items.

The mentioned example JSON as of 2023-12-20 is attached.
create-file-2023-12-20.json