feat: crud and backups are working

backend/app/schemas.py

@@ -0,0 +1,17 @@
+from pydantic import BaseModel
+
+
+class ItemBase(BaseModel):
+    name: str
+    description: str | None = None
+
+
+class ItemCreate(ItemBase):
+    pass
+
+
+class Item(ItemBase):
+    id: int
+
+    class Config:
+        from_attributes = True