document deleting pseudonym domains See merge request !106
see castellum!2278
new section: Legal basis See merge request !105
tweak security section See merge request !103
restructure "privacy" section to "pseudonyms" See merge request !104
redundant with privacy introduction
"Cleanup" wording See merge request !102
Update docs to 0.72 See merge request !101
castellum!2223
adapt to castellum 0.70 See merge request !100
no longer true since castellum!2183
no longer true since castellum!2135
