feat: crud and backups are working

backend/app/models.py

@@ -0,0 +1,11 @@
+from sqlalchemy import JSON, Column, Integer, String
+from .database import Base
+
+
+class Item(Base):
+    __tablename__ = "items"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String, index=True)
+    description = Column(String, nullable=True)
+    body = Column(JSON, nullable=False)