For the first release, Herosite can store short-link workspace metadata locally and send operators into your existing Short.io dashboard at https://app.short.io/users/dashboard/1871978/links. That means no SQL tables are required for the MVP.
No, not for this MVP. JSON files are enough for account state, workspace settings, and notes.
Move to a database later if you need redirects, analytics, alias collision control, or high-volume admin workflows.