(draft) Issues to consider for DTEs, crypto certificates, signatures, etc

- https://github.com/fyntex/fynpal-v0/issues/1921
- https://github.com/fyntex/fynpal-v0/pull/1933
- https://github.com/fyntex/fynpal-v0/pull/1945
- https://github.com/fyntex/fynpal-v0/pull/1955
- https://github.com/fyntex/fynpal-v0/pull/1972