[engine-failure] PROJ-451-predicting-the-glass-forming-region-of-m @ tasks: RuntimeError

Automated report (spec 023 / FR-016) — an unexpected engine failure occurred while processing **PROJ-451-predicting-the-glass-forming-region-of-m** 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: tasked\nartifact_path: projects/PROJ-451-predicting-the-glass-forming-region-of-m/specs/001-predicting-the-glass-forming-region-of-m/tasks.'
```

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 involved in spec 023 / FR-016 at the tasks stage, using the reported review frontmatter and truncated artifact path as entry points. Reproduce the RuntimeError and verify that contentless or truncated reviews cannot count as acceptance and that the project remains schedulable for retry.

Written by the indexing model from the issue text.