{"message":"Enhanced Product Image Similarity API","version":"2.0.0","features":["High-performance vector search with FAISS","Async image processing","Feature caching","Comprehensive error handling","API key authentication","Product-level similarity search"],"endpoints":{"train":"POST /train - Start training model for a merchant (background)","training_status":"GET /train/status/{task_id} - Get training progress","training_tasks":"GET /train/tasks - Get all training tasks (debug)","merchant_training":"GET /merchants/{merchant_id}/training/status - Get merchant training tasks","find_similar":"POST /find_similar - Find similar images","find_similar_products":"POST /find_similar_products - Find similar products (aggregated)","health":"GET /health - Health check","stats":"GET /merchants/{merchant_id}/stats - Get training statistics","delete_model":"DELETE /merchants/{merchant_id}/model - Delete trained model"}}