model: Add OriginVisitUpdate model object
(pairing with @vlorentz)
- Need to be updated according to @douardda's latest improvments on model (if that got merged before ;)
Related to T2310
Test Plan
tox
Migrated from D2880 (view on Phabricator)
Staging instance, all changes can be removed at any time
(pairing with @vlorentz)
Related to T2310
tox
Migrated from D2880 (view on Phabricator)