perf: reuse isolated OCR runner - #394
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suguanYang
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Summary
ocr.pagescallMotivation
The previous version isolated OCR but restarted the process/model for every page. This version keeps CPU bounded while avoiding repeated model initialization. Only one OCR request is in flight at a time, so a 70-page scan may be slow but does not fan out OCR CPU work.
Verification
uv run pytest -q tests/contract/test_ocr_pages_contract.py tests/contract/test_doc_profile_anatomy_contract.py— 29 passeduv run ruff check app/services/document_agent/tools/ocr_pages.py tests/contract/test_ocr_pages_contract.pyThe local reproduction PDF was not committed.