fix(backend): execution UI did not receive completed / failed execution update (#10149)

<img width="1410" alt="image"
src="https://github.com/user-attachments/assets/bce407a2-96a1-42e9-9772-b49b8f20886c"
/>


### Changes 🏗️

Add the missing `send execution update` command on completed/update
status change for the node execution.

### Checklist 📋

#### For code changes:
- [x] I have clearly listed my changes in the PR description
- [x] I have made a test plan
- [x] I have tested my changes according to the test plan:
  <!-- Put your test plan here: -->
  - [x] Screenshot attached

autogpt_platform/backend/backend/executor/manager.py

@@ -717,13 +717,15 @@ class Executor:
             execution_stats.nodes_walltime += result.walltime
             if (err := result.error) and isinstance(err, Exception):
                 execution_stats.node_error_count += 1
-                cls.db_client.update_node_execution_status(
-                    node_exec_id=node_exec_id,
+                update_node_execution_status(
+                    db_client=cls.db_client,
+                    exec_id=node_exec_id,
                     status=ExecutionStatus.FAILED,
                 )
             else:
-                cls.db_client.update_node_execution_status(
-                    node_exec_id=node_exec_id,
+                update_node_execution_status(
+                    db_client=cls.db_client,
+                    exec_id=node_exec_id,
                     status=ExecutionStatus.COMPLETED,
                 )