Infer properties without storing them on the table

Hello!

I have a question regarding something that I haven't been able to figure out just by looking at the documentation.
I have the following entity sample:
```
const UserTodoEntity = new Entity({
name: "UserTodo",
table,
schema: item({
userId: string().transform(prefix("USER")).savedAs("PK").key(),
projectId: string().key(),
todoId: string().key(),
isActive: boolean(),
}),
computeKey: ({ userId, projectId, todoId }) => ({
PK: userId,
SK: `PROJECT#${projectId}#TODO#${todoId}`,
}),
});
```
Looking at the data stored on the table, I see that projectId and todoId, on top of being available within the SK, are also stored as attributes - albeit they could be inferred through the SK.
Is there a way to do this?

Thank you!