Fix NameError: request not defined in Claude provider cache check

- Use self.user_id and self.provider_id instead of request object
- Fixes the 'name 'request' is not defined' error in Claude provider
- Cache settings are now properly checked for each user request

aisbf/providers/claude.py

@@ -853,8 +853,8 @@ class ClaudeProviderHandler(BaseProviderHandler):
         
         # Apply prompt caching based on user and provider settings
         cache_config = self._get_cache_config(
-            user_id=getattr(request, 'user_id', None),
-            provider_id=getattr(request, 'provider_id', None),
+            user_id=getattr(self, 'user_id', None),
+            provider_id=self.provider_id,
             model_name=model
         )