Reset error_retries on successful loop iteration

Reset the error_retries counter immediately after a successful message-loop iteration inside the Agent class, and remove the redundant reset outside the loop. This consolidates the retry counter logic so it is cleared only when an iteration completes successfully.

agent.py

@@ -491,6 +491,8 @@ class Agent:
                             if tools_result:  # final response of message loop available
                                 return tools_result  # break the execution if the task is done
 
+                        error_retries = 0  # reset retry counter on successful iteration
+
                     # exceptions inside message loop:
                     except InterventionException as e:
                         error_retries = 0  # reset retry counter on user intervention
@@ -515,8 +517,6 @@ class Agent:
                                 "message_loop_end", loop_data=self.loop_data
                             )
 
-                    error_retries = 0  # reset retry counter on successful iteration
-
             # exceptions outside message loop:
             except InterventionException as e:
                 error_retries = 0  # reset retry counter on user intervention