The catalog failures that hurt UX — a drill/parts fetch that fails into an empty
"couldn't load" panel, or a decoded vehicle whose category tree comes back empty
("model var ama parça yok") — all return HTTP 200 with a degraded body. Nothing
throws, so the global Sentry exception filter never sees them and they go
unnoticed (serkan's complaint was exactly this class). Report them explicitly.
- new common/catalog-degradation.ts: reportCatalogDegradation(kind, ctx),
fingerprinted by kind+source+brand so each failure mode collapses into one
countable Sentry issue (e.g. "drill-load-error · pl24/Ford — N events, M users").
- categories.service: capture on getCategoryWithParts loadError and on an empty
getCategoryTree, Redis-deduped to <=1 event/hour per category/vehicle so a
broken catalog can't flood the stream; telemetry never throws into the request.
tsc + biome clean, categories suite 10/10.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Semih Yesilyurt
e8e9771759