fix(tradein): review minors — scheduler comment + save-error log label

- scheduler.py: исправлен stale-комментарий yandex_detail_backfill
  (был: «YandexDetailScraper httpx, no proxy layer»;
   теперь: fetch via curl_cffi chrome120 + scraper_proxy_url,
           parse via YandexDetailScraper.parse)
- yandex_detail_backfill.py: outer except — сообщение лога изменено на
  «save/iteration error for listing_id=%d» чтобы отличать save-ошибку
  от fetch/parse-None путей (run_id убран — он менее важен в этом scope)

tradein-mvp/backend/app/services/scheduler.py

@@ -59,7 +59,8 @@ Sources:
   - yandex_detail_backfill  → run_yandex_detail_backfill
                               (tasks/yandex_detail_backfill.py, #1553; nightly backfill of
                               yandex detail_enriched_at for ~3952 listings never enriched by
-                              city_sweep; YandexDetailScraper httpx, no proxy layer;
+                              city_sweep; fetch via curl_cffi chrome120 + scraper_proxy_url,
+                              parse via YandexDetailScraper.parse;
                               window 12:00-15:00 UTC — после avito_detail_backfill 09-12 UTC)
 """
 

tradein-mvp/backend/app/tasks/yandex_detail_backfill.py

@@ -263,8 +263,7 @@ async def run_yandex_detail_backfill(
                 except Exception as exc:
                     counters.failed += 1
                     logger.warning(
-                        "yandex_detail_backfill: run_id=%d listing_id=%d failed: %s",
-                        run_id,
+                        "yandex_detail_backfill: save/iteration error for listing_id=%d: %s",
                         listing_id,
                         exc,
                     )