fixes and refactor

app/config.py

@@ -57,6 +57,10 @@ class Settings(BaseSettings):
     log_rotation: str = "10 MB"
     log_retention: str = "30 days"
 
+    # Cache / Redis
+    cache_enabled: bool = False
+    redis_url: Optional[str] = None
+
     # pydantic-settings v2 configuration
     model_config = SettingsConfigDict(
         env_file=".env",