The craft-ecproj-format pin moves to storytold/craft-libs#409's new
head, where Head::read is the one reader and saved_by() is removed.
effectcraft-project's saved_by reads savedBy with Head::read, and from
ReadError::TooNew for a project with a newer schema.
saved_by now returns None for text that is not a JSON object with a u32
schema. EffectCraft calls it only on files Project::from_json opened,
so opening and importing projects are unchanged.
effectcraft-project writes and checks the envelope of .ecproj files with
craft-ecproj-format from craft-libs: File (savedBy, then the saved view
and the project) with to_json and to_json_compact for Save Compact
Project Files, check_schema and its message, SCHEMA_VERSION and
saved_by, which stay re-exported under their names. Project, SavedView
and the schema 1 conversion stay here.
Saved files are byte-identical. saved_by now reads only a JSON object,
so a project written as a JSON array no longer reports a savedBy.
dotCooCoo