4211e587ee
- Add qa_models.py with TextQAItem, GenTextQARequest, QAPair, ImageQAItem, GenImageQARequest, ImageQAPair, TextQAResponse, ImageQAResponse - Implement gen_text_qa(): batch-formats triples into a single prompt, calls llm.chat(), parses JSON array via extract_json() - Implement gen_image_qa(): downloads cropped image from source-data bucket, base64-encodes inline (data URI), builds multimodal message, calls llm.chat_vision(), parses JSON; image_path preserved on ImageQAPair - Replace qa.py stub with full router: POST /qa/gen-text and /qa/gen-image using Depends(get_llm_client) and Depends(get_storage_client) - 15 new tests (8 service + 7 router), 53/53 total passing
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