[engine-failure] PROJ-528-predicting-molecular-conductivity-from-g @ tasks: RuntimeError

Automated report (spec 023 / FR-016) — an unexpected engine failure occurred while processing **PROJ-528-predicting-molecular-conductivity-from-g** 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-528-predicting-molecular-conductivity-from-g/specs/001-predicting-molecular-conductivity-from-g/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] validation at the tasks stage for spec 023 / FR-016 and inspect how the review frontmatter is parsed. Reproduce the reported RuntimeError using the PROJ-528 tasks review, then verify that reviews with verdict or concerns/action_items are accepted while contentless or truncated reviews are rejected.

Written by the indexing model from the issue text.