[DFL-AUDIT-155] Devpost prose quality

## Finding

**Original score:** 2/10  
**Owner:** Human  
**Priority:** P0  
**Workstream:** `codex-narrative`

## Evidence

Candid but meandering and self-undermining for judges.

## Acceptance

Resolve the finding with reproducible evidence, or record an explicit accepted-risk decision.

Dependencies: DFL-AUDIT-154.