code reviewed

checklist.md

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+# Refactoring Checklist: Backend Folder Structure
+
+## Goal
+Restructure the backend code into a more modular, maintainable format.
+
+## Steps
+
+- [ ] 1. Create new folders inside `backend/`: `api/`, `data/`, `models/`, `services/`, `utils/`
+- [ ] 2. Move `app.py` to `main.py` in `backend/`
+- [ ] 3. Move `data_utils.py` to `backend/data/data_utils.py`
+- [ ] 4. Move `image_similarity.py` and `image_utils.py` to `backend/services/`
+- [ ] 5. Move `llm_tag_similarity.py`, `tag_identification.py`, and `tag_match.py` to `backend/models/`
+- [ ] 6. Move `result_aggregation.py` to `backend/services/`
+- [ ] 7. Move `front_tag_embeddings.index` and `tag_identification_cache.json` to `backend/data/`
+- [ ] 8. Update all import statements to reflect the new structure
+- [ ] 9. Test the application to ensure everything works
+- [ ] 10. Update documentation if needed