Pass DataStore Upsert Original pSQL Error Messages

[JVickery-TBS]

feat(logic): ds upsert info;

• Include the original psql error message and code in the upsert errors.

This will allow Recombinant to parse the FK constraint error messages, without showing the pSQL error to the user still.

[wardi]

instead of maintaining this patch on our fork can we parse the FK errors here and return them in a way that would be useful for all API users? That kind of a change could go upstream eventually

[JVickery-TBS]

@wardi like the REGEX parsing that I have done in Recombinant? Move it into the ckanext-datastore postgres.py ??

[JVickery-TBS]

@wardi I threw the Foreign Key info for datastore_info into this one too if your able to review that here as well??

[JVickery-TBS]

@wardi okay! should be handling the foreign constraint errors in here now. Will parse them and give an error message along with a dict of the parsed values (ref keys, ref values, ref table name).