📚 Documentação inicial do ALETHEIA

- MANUAL-PRODUTO.md: Manual do usuário final
- MANUAL-VENDAS.md: Estratégia comercial e vendas
- MANUAL-TECNICO.md: Infraestrutura e deploy
- README.md: Visão geral do projeto

backend/app/models/product.py

@@ -0,0 +1,17 @@
+from sqlalchemy import Column, Integer, String, Text, DateTime
+from datetime import datetime, timezone
+from app.database import Base
+
+class Product(Base):
+    __tablename__ = "products"
+    id = Column(Integer, primary_key=True, index=True)
+    barcode = Column(String, unique=True, index=True, nullable=False)
+    name = Column(String)
+    brand = Column(String)
+    category = Column(String)
+    ingredients_text = Column(Text)
+    nutri_score = Column(String)
+    nova_group = Column(Integer)
+    nutrition_json = Column(Text)  # JSON string
+    image_url = Column(String)
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))