[engine-failure] PROJ-823-llmxive-follow-up-extending-multabench-b @ tasks: PermanentBackendError

Automated report (spec 023 / FR-016) — an unexpected engine failure occurred while processing **PROJ-823-llmxive-follow-up-extending-multabench-b** at stage `tasks`.

```
PermanentBackendError: no available server
```

The project remains schedulable; it will retry on its normal cadence and recover once the underlying defect is fixed. Closing this issue does not require any project-state change.

Start by tracing processing of PROJ-823-llmxive-follow-up-extending-multabench-b at the `tasks` stage and investigate why no server is available. Confirm the failure can be reproduced and that the project can complete its normal retry cadence once the underlying engine problem is fixed.

Written by the indexing model from the issue text.