[engine-failure] PROJ-842-llmxive-follow-up-extending-dvao-dynamic @ tasks: RuntimeError

Automated report (spec 023 / FR-016) — an unexpected engine failure occurred while processing **PROJ-842-llmxive-follow-up-extending-dvao-dynamic** at stage `tasks`.

```
RuntimeError: LLMReviewer[ordering]: review frontmatter has neither `verdict:` nor `concerns:`/`action_items:` — a contentless/truncated review MUST NOT count as acceptance (false-convergence guard). First 200 chars: '```yaml\n---\nreviewer_name: ordering\nreviewer_kind: llm\nstage: tasks\nartifact_path: projects/PROJ-842-llmxive-follow-up-extending-dvao-dynamic/specs/001-llmxive-follow-up-extending-dvao-dynamic/tasks.m'
```

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 the LLMReviewer[ordering] handling for the review frontmatter shown in the report, especially the missing verdict, concerns, and action_items fields. Reproduce the failure for spec 023 / FR-016 if possible, then identify the expected handling for a contentless or truncated review. Done means the false-convergence guard behaves correctly and the reported engine failure no longer occurs.

Written by the indexing model from the issue text.