Merge tables vs_kandidatur and commitment

Mapping

vs_kandidatur	commitment	Remark
—	uuid	Needs to be newly generated in some way
	status
	office_uuid
—	is_private	Set to 1 when migrating, so the names of these people are generally not shown via the API.
id	—	Deleted. Maybe we can keep a mapping from uuid to id in cold storage in some archive, but I would tend to avoid keeping this id.
created_on	registered_on
ip	registration_ip
gewaehlt
gremium
geschlecht
fakultaetFachschaft
lesung
bewerbungstext
customCode	confirmation_code	Used to generate a mail with which the person can confirm their candidacy
bestaetigt	confirmed	"ja" ↦ 1, "nein" ↦ 0
dummycol_geschlecht	—	Always empty, can be deleted
first_name	first_name
last_name	last_name
email	email
phone_number	phone_number
uni_id	uni_id
matriculation_number	matriculation_number
birth_date	birth_date	Birth dates of 0000-00-00 need to be set to NULL before merging
comment	comment