notes/__init__ re-exported 17 names so it could stand in for the old single
module. Only sync.py and test_notes.py used that, and each now imports from
the module that defines the name; __all__ and the nine imports __init__ held
only for it go. sync.py also drops sa_delete, func, live and NoteLabel,
unused since 8eff5f6 (#5382). The integration test's patch on
inkwell.notes.schedule_unfurls stays: the routes call it from there.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>