admin can soft delete listings

backend/models/Item.js

@@ -141,6 +141,26 @@ const Item = sequelize.define("Item", {
       key: "id",
     },
   },
+  isDeleted: {
+    type: DataTypes.BOOLEAN,
+    defaultValue: false,
+  },
+  deletedBy: {
+    type: DataTypes.UUID,
+    allowNull: true,
+    references: {
+      model: "Users",
+      key: "id",
+    },
+  },
+  deletedAt: {
+    type: DataTypes.DATE,
+    allowNull: true,
+  },
+  deletionReason: {
+    type: DataTypes.TEXT,
+    allowNull: true,
+  },
 });
 
 module.exports = Item;