1. routes/apps/restore.js: backupManager was being passed by the
aggregator (routes/apps/index.js:58) but never destructured in the
factory signature. Every apps/restore request 500'd with
ReferenceError. Added backupManager to the destructure + an explicit
throw if missing so the next regression surfaces at startup instead
of at the first call.
2. routes/dns.js:555: file imports { success, error } from
../src/utils/responses but used ok(res, ...) (defunct alias). DNS
credential save path 500'd. Changed to success() to match the rest
of the file.
3. src/utilities/middleware.js: deleted /api/v1/billing/checkout from
PUBLIC_ROUTES — dead entry, no route mounted. Drift test caught it
(DC-017 guard). Updated the comment to cover both checkout + webhook
as removed.
Tests: 1428/1428 pass (drift test now green).
Lint: 0 no-undef errors across src/ + routes/ (was 7).
Refs: DashCaddy audit 2026-08-02