fix(scraper-kit): sync RealScraperConfig adapter with ScraperConfig protocol (cookie_encryption_key)

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

@@ -146,6 +146,10 @@ class RealScraperConfig:
     def cian_valuation_max_rub(self) -> float:
         return _settings.cian_valuation_max_rub
 
+    @property
+    def cookie_encryption_key(self) -> str:
+        return _settings.cookie_encryption_key
+
     @property
     def glitchtip_dsn(self) -> str | None:
         return _settings.glitchtip_dsn