`Uncovered` was pinned only for a world with no deficit row, so pushing it
only when no jurisdiction was named survived. The new test sweeps a world
whose commons root is in deficit and whose unpositioned debtor holds a
MissingStructure boundary no root covers; one sweep must run the deficit
session and a session under `Uncovered` for that boundary.
The unpositioned-debtor world moves into `unpositioned_debtor_world`, taking
the scale intent, and the existing no-root test uses it unchanged.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>