What happened? (You can include a screenshot if it helps explain)

ERT spams exceptions from forward_model_ok if storage is deleted mid run (missing responses.json)

What did you expect to happen?

Exception should only be logged once, and we wouldn't try fm_ok again as it is an error we cannot recover from.

steps to reproduce

Run duplicate poly_eval multiple times in poly.ert.
Run it, and delete entire storage folder mid-run.

Environment where bug has been observed

• python 3.11
• python 3.12
• macosx
• rhel7
• rhel8
• local queue
• lsf queue
• slurm queue
• openPBS queue