Validation at file download stage

[andrazrepar]

If the user selects the option Without namespaces, then we need to package the information about validation in a txt file and provide a download link. Which means that after the transformation is complete, in addition to the file download link, we also need to have a link for the validation log file.

This is the output of the mapper.Transform function:

[2022-04-26 11:46:51,064] [INFO] Calling relaxNg.validate.
[2022-04-26 11:46:51,065] [INFO] Relax-NG validation failed:
<string>:1:0:ERROR:RELAXNGV:RELAXNG_ERR_NOELEM: Expecting an element sense, got nothing
<string>:1:0:ERROR:RELAXNGV:RELAXNG_ERR_CONTENTVALID: Element body failed to validate content

@LukeItUp, can you prepare the backend function?

[LukeItUp]

Deployed to staging.

After making download call without namespaces, API stores validation log file and it can be pulled using the following call:
GET http://0.0.0.0:5000/api/transform/XFID/validation/DSID

[gradisarjoze]

@LukeItUp this endpoint always returns No validation file found, retry downloading file without namespaces even thought the file was downloaded with strip_ns=true.

[gradisarjoze]

A button was pushed to staging. It's present after you download the file without ns.

[andrazrepar]

I get 409 response when clicking the button.

[andrazrepar]

Also, the first download button, downloads the validation file, not the dictionary.