[engine-failure] PROJ-139-the-influence-of-emotional-contagion-on- @ tasks: RuntimeError

Automated report (spec 023 / FR-016) — an unexpected engine failure occurred while processing **PROJ-139-the-influence-of-emotional-contagion-on-** at stage `tasks`.

```
RuntimeError: LLMReviewer[constraint_preservation]: 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: constraint_preservation\nreviewer_kind: llm\nstage: tasks\nartifact_path: projects/PROJ-139-the-influence-of-emotional-contagion-on-/specs/001-the-influence-of-emotional-contag'
```

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 with the automated report for spec 023 / FR-016 and the truncated review artifact under projects/PROJ-139-the-influence-of-emotional-contagion-on-/specs/001-the-influence-of-emotional-contagion-on-. Trace the tasks-stage LLMReviewer[constraint_preservation] failure and determine why the review lacks verdict, concerns, or action_items. Done means the underlying defect is fixed and the report no longer treats a contentless review as acceptance.

Written by the indexing model from the issue text.