[engine-failure] PROJ-429-the-impact-of-network-efficiency-on-age- @ tasks: RuntimeError

Automated report (spec 023 / FR-016) — an unexpected engine failure occurred while processing **PROJ-429-the-impact-of-network-efficiency-on-age-** 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: fleshed_out_complete\nartifact_path: projects/PROJ-429-the-impact-of-network-efficiency-on-age-/specs/001-the-impact-of-network-efficiency-'
```

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] path at the tasks stage and inspect the review frontmatter for projects/PROJ-429-the-impact-of-network-efficiency-on-age-/specs/001-the-impact-of-network-efficiency-. Reproduce spec 023 / FR-016 and determine what behavior is expected when the review is truncated or lacks verdict, concerns, and action_items.

Written by the indexing model from the issue text.