Post-registration full re-verify (§14.7) found an unauthenticated CSRF-reachable
arbitrary-directory delete: DatasetProject.make(reset=True) runs shutil.rmtree on an
uncontained os.path.join(output_dir, dataset_name) (nodes/common.py:169-173) — an
absolute or ..-containing name escapes the output dir. Removed from default + node_db/new,
added to node_db/dev with [SECURITY ISSUE] suffix (reversible install-block, §4.7-H mechanic).
Restore to default on author fix (realpath+commonpath containment) + re-verify pass.