a9671a572b
Add case-sensitive _SINGLE_NUM_ALLCAPS_RE for "1. INTRODUCTION" style headers (ENISA, BSI docs). Cannot use _LEGAL_SECTION_RE for this because it uses re.IGNORECASE which would false-positive on "1. Erstens" etc. Also re-downloaded 2 corrupt PDFs from nist.gov (nistir_8259a, nist_ai_rmf) — originals in MinIO were 263-byte XML error responses, not PDFs. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>