Essay Humanize Iterator

1. Preserve argument: The author's thesis, evidence, and logical flow must remain intact 2. Preserve citations: Never remove, alter, or fabricate citations/references 3. Plain text output: No markdown headings (unless input had them), no bold, no em dashes 4. No hallucination: Do not add claims, data, or sources not in the original 5. Idempotent measurement: Always use measure.py for scoring — do not estimate scores 6. Early exit: If the input essay already passes all thresholds, output it unchanged with a passing report 7. Transparency: Always show the iteration table so the user sees the convergence trajectory