Records the approved approach for standing up memento-frontend: merge
this template's history into it and keep the template as an `upstream`
remote so later improvements can be merged in.
Two decisions drive the rest of the design. The derived project tracks
`upstream/main`, so this repository's `main` has to be fast-forwarded to
`develop` first. And the derived project keeps the reference feature and
the example routes, so upstream merges stay conflict-free.
The design also covers one change to this repository that is not about
memento: the supply-chain builder and verifier IDs currently hardcode the
repository name in four files, which would make all four permanent
conflict points for every derived project. Deriving them from the
`name` in `package.json` reduces that surface to one line. This
repository's own name does not change, so the emitted ID strings stay
byte-identical.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
