* Fix dev mandatarissen without persons
* Extend migration to mandatarissen without type
Fortunately they all seemed to have a start date, so I used this
predicate to get all the mandatarissen without a type and delete them.
* Config changes to support the new "change event" data model
* Add mock data that matches the new change event model
This data can be inserted into the database by mounting the folder into the migrations service.
Co-authored-by: Boris De Vloed <boris.de.vloed@gmail.com>
Co-authored-by: Boris De Vloed <boris.de.vloed@gmail.com>
