tree 0a70db9a9b0d475243cf94102ece433ebaa528a0
parent 21e9f7aaea591a2889b040ba8d4e15234ccf8853
author Serge Bazanski <q3k@hackerspace.pl> 1604067449 +0100
committer q3k <q3k@hackerspace.pl> 1605559088 +0000

invoice: add GTU and SP codes

These are codes defined in JPK_V7, ie. the control file submitted to
Polish tax authorities for all invoices created in a given month. We
need to now tag our invoices with the appropriate codes when submitting
them to our accountants, which will pass them on over to the tax
authoritiex in a JPK_V7M file.

This only adds the relevant enums and adds them to proto messages, but
does not actually implement any control/model logic.

Change-Id: I695d05b55143a248dab9346151da3c572c7665d4