fix(agent): restore end_turn in run_conversation finally

Keep relay turn teardown when clearing activity labels after a turn exits.

run_agent.py

@@ -7563,6 +7563,13 @@ class AIAgent:
                 finish_task_run(**task_context, error=exc)
             raise
         finally:
+            try:
+                if relay_turn is not None:
+                    relay_runtime.SESSION_COORDINATOR.end_turn(
+                        relay_turn,
+                        outcome=relay_outcome,
+                    )
+            finally:
                 try:
                     if relay_lease is not None:
                         relay_runtime.SESSION_COORDINATOR.release_conversation(
@@ -7581,9 +7588,6 @@ class AIAgent:
                         reset_accounting_context(acct_token)
                     if token is not None:
                         reset_conversation_context(token)
-                        reset_accounting_context(acct_token)
-                    if token is not None:
-                        reset_conversation_context(token)
 
     def chat(self, message: str, stream_callback: Optional[callable] = None) -> str:
         """