Fix TypeError: object of type int has no len() (langgenius#24484)

Signed-off-by: zhanluxianshen <zhanluxianshen@163.com>

Author: zhanluxianshen

api/core/moderation/base.py

@@ -100,14 +100,14 @@ def _validate_inputs_and_outputs_config(cls, config: dict, is_preset_response_re
             if not inputs_config.get("preset_response"):
                 raise ValueError("inputs_config.preset_response is required")
 
-            if len(inputs_config.get("preset_response", 0)) > 100:
+            if len(inputs_config.get("preset_response", "0")) > 100:
                 raise ValueError("inputs_config.preset_response must be less than 100 characters")
 
         if outputs_config_enabled:
             if not outputs_config.get("preset_response"):
                 raise ValueError("outputs_config.preset_response is required")
 
-            if len(outputs_config.get("preset_response", 0)) > 100:
+            if len(outputs_config.get("preset_response", "0")) > 100:
                 raise ValueError("outputs_config.preset_response must be less than 100 characters")