feat(research): Implement research APIs.

test/testimages/receipt-annie/README.md

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+# Receipt Image Attribution
+
+## receipt.jpg
+
+**Photographer:** Annie Spratt (@anniespratt)
+**Source URL:** https://unsplash.com/photos/a-receipt-sitting-on-top-of-a-wooden-table-recgFWxDO1Y
+**Direct Link:** https://images.unsplash.com/photo-1731686602391-7484df33a03c
+
+### Metadata
+- **Title:** A receipt sitting on top of a wooden table
+- **Description:** Download this free HD photo of text, document, invoice, and receipt by Annie Spratt
+- **Date Published:** November 15, 2024
+- **Tags:** text, document, invoice, receipt, diaper
+
+### Statistics
+- **Views:** 54,593
+- **Downloads:** 764
+
+### License
+**Unsplash License** - Free to use
+- ✅ Commercial and non-commercial use
+- ✅ No permission needed
+- ❌ Cannot be sold without significant modification
+- ❌ Cannot be used to replicate Unsplash or similar service
+
+Full license: https://unsplash.com/license
+
+### Usage in This Project
+This image is used for testing vision/image processing capabilities in the SmartAI library test suite, specifically for:
+- Testing text extraction and OCR capabilities
+- Document recognition and classification
+- Receipt/invoice analysis
+- Text-heavy image understanding
+- Structured data extraction from documents
+
+### Download Information
+- **Downloaded:** September 28, 2025
+- **Original Filename:** annie-spratt-recgFWxDO1Y-unsplash.jpg
+- **Resolution:** High resolution (3.3 MB)
+- **Format:** JPEG