Deprecation Warning CGI

From https://gitlab.com/teklia/workers/base-worker/-/jobs/3854136872

.tox/arkindex_worker/lib/python3.11/site-packages/apistar/client/decoders.py:1
  /builds/teklia/workers/base-worker/.tox/arkindex_worker/lib/python3.11/site-packages/apistar/client/decoders.py:1: DeprecationWarning: 'cgi' is deprecated and slated for removal in Python 3.13
    import cgi

changed milestone to %ML Prod - Next

added P3 Quick Win labels

removed Quick Win label

Rip apistar in py3.13