* test(api): cover JSON backup restore end to end
Export a workspace through GET /api/v1/backups/json and restore it into
another installation through the restore routes, on SQLite with every
migration and filesystem storage, the way the ZIP backup does:
- notebooks, notes, revisions, tags, pinned state and files round-trip
unchanged, and the restored notes are searchable and tagged;
- restoring the same backup twice changes nothing and keeps one object
per file, and re-restoring a file replaces and removes its old object;
- restoring brings back notes and notebooks deleted after the backup and
undoes later edits;
- damaged or minimal content falls back safely (empty document, Markdown
derived from JSON, default title, normalized tags);
- ids used by another workspace, notebooks or notes pointing outside the
workspace, revisions of another note, invalid file metadata, missing
notes, empty files and another user's file id are rejected without
writing;
- only signed-in users can restore.
Raises line coverage of backup-service.ts from 6% to 99% and of
backup-routes.ts from 46% to 94%.
* fix(api): validate a restore page before writing any note
restoreJsonMemos checked that each revision belongs to its note inside the
write loop, so a page whose second note carried another note's revision
returned 400 after the first note had already been restored. The check now
runs for the whole page before anything is written.