Confirmed via dev probes: the de account is non-demo (licensed) for Hyundai parts but does NOT have the EUR/TR-region catalogs our vehicles use, so the fallback returned non-demo-but-empty and just doubled upstream load. Root cause of empty Hyundai/Kia/Nissan parts is PL24 licensing/region (tr account not licensed for these brands' parts) — a commercial issue, not code-fixable. Keeping only the explanatory comment. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>