Update to mask_pii method to mask only the response content and not t…

…he reference links

apps/chatbot/src/modules/chatbot.py

@@ -127,7 +127,11 @@ def _unmask_reference(self, response_str: str, nodes) -> str:
     def mask_pii(self, message: str) -> str:
         if USE_PRESIDIO:
             try:
-                return self.pii.mask_pii(message)
+                split_message = message.split("Rif:")
+                masked_message = self.pii.mask_pii(split_message[0])
+                if len(split_message)>1:
+                    masked_message = masked_message + "Rif:" + split_message[1]
+                return masked_message
             except Exception as e:
                 logging.warning(f"[chatbot.py - mask_pii] exception in mask_pii: {e}")
         else: