Final pipeline step. Three mechanical transforms:
1. include_ocr_text -> concatenate non-tag line texts, pages joined
with \n\n, write to ocr_result.result.text.
2. include_geometries=False (default) -> strip ocr_result.result.pages
+ ocr_result.meta_data. Geometries are heavy; callers opt in.
3. Delete response.context so the internal accumulator never leaks to
the caller (belt-and-braces; Field(exclude=True) already does this).
validate() always returns True per spec.
7 unit tests in tests/unit/test_response_handler_step.py cover all
three branches + context-not-in-model_dump check.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
