[6.0.1] NPE on result without attachment

When returning a result without attachments, an error occurs and the status of the automated suite is blocked at running.

To reproduce this issue:

Orchestrator version: 4.8.0
Squash version: 6.0.0

Steps:

• Define three Robot Framework tests, ensuring that one of them contains a false automated test reference.
• Run an iteration that includes these Robot Framework tests.

Upon completion, here the output in the web interface:

The status of the 'false' test is set to 'à exécuter,' and the completion bar is also blocked.