Merge the wrong-folder work into the repo: donor_ledger.yaml (44 rows, 12 required areas) and the characterization suite under tests/characterization/ (61 tests incl. ledger lint). Drop the superseded first iteration (donor_ledger/ledger.json, test_donors/test_ledger/traceability, fixtures). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>