Improve rotated/vertical text handling without running expensive full-page rotated OCR.
Acceptance criteria:
- Detect candidate text zones near traced leader-line endpoints.
- Run rotated OCR only on local crops around those zones.
- Compare runtime against current OCR pipeline.
- Add benchmark cases covering rotated, vertical, and angled dimension text.
Improve rotated/vertical text handling without running expensive full-page rotated OCR.
Acceptance criteria: