The target refusals answer with eight new meta.errorCode values; they
are now constants the catalogue sweep reads and entries in the
published catalogue, so a client can branch on them without triggering
each one. The upload handler had grown past its size baseline with the
target branch, so the target checks, the file read and the schema check
move into named functions beside it, unchanged. The target check route
holds its params to a strict schema like every other route.
A restore replaces the account's records and has no merge, so the copy
of an account that no longer exists may only go into an account that
holds none of the records a backup carries. The check reads every
backed-up model by its userId, reaches the owner-less children through
their parent, and is held to the schema so a new model cannot be read
as empty. Managed profiles and accounts pending deletion are refused as
well. The admin console asks GET /api/admin/backups/targets/{userId}
before it sends a file again, so a refusal costs no upload.
Marc-André Bombeck