Review round 4 (both nits):
- Rename the flag to ignore_ocr_enabled so its OCR-specific scope is explicit at
the call sites (the gate only bypasses the OCR-enabled check).
- Add test_evaluate_escalation_empty_suppressed_even_when_structured_registered:
empty_text (minimum='ocr') skips a registered structured tier and suppresses to
ocr when OCR is off, never hopping to structured.
Deck #324.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>