📚 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/scan.py

@@ -0,0 +1,15 @@
+from sqlalchemy import Column, Integer, String, Text, ForeignKey, DateTime
+from datetime import datetime, timezone
+from app.database import Base
+
+class Scan(Base):
+    __tablename__ = "scans"
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    barcode = Column(String, nullable=False)
+    product_name = Column(String)
+    brand = Column(String)
+    score = Column(Integer)
+    summary = Column(Text)
+    analysis_json = Column(Text)  # Full AI analysis as JSON
+    scanned_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))