Discuss best return format for process file_id

[renatomassaro]

Specially on partial processes, the client does not have access to the object with such file_id, in which case we have to send file name and version directly.

Also related is how to handle never-ending processes on the client model (some processes do not have known completion time, nor progress, and are thus always running). Bruteforce, LogForger, Overflow are some examples. Download/Upload/BankTransfer are examples of processes where the user knows the completion date beforehand.

@kress95

[chrisfls]

Wait, is File ID private even for full access? If it's not, don't worry, I'm aware that it should be a Maybe (because not every process comes from a file).

I think that the best choice is moving the file id to the full access record, as a maybe.

[renatomassaro]

Superseded by #272