Backend: mig 110/111 (will be renumbered after merging main),
validators + helpers widened, BuildProjectCode helper + projection
populator wired into List/GetByID/ListAncestors/GetTree/CCR. All
internal Go tests pass.
Frontend: ProjectFormFields conditional render — opponent_code on
litigation, our_side renamed to Client Role on case with grouped
optgroups. i18n keys for both DE and EN. fristenrechner perspective
mapping widened. project-form.ts payload reader/writer + showFieldsForType
toggle for new litigation block.
Migration slots about to be bumped (mig 110 was claimed by euler's
project_type_other on main).
