date field, disable being cast to Date automatically

### Prerequisites

- [x] I have written a descriptive issue title

### Mongoose version

8.x

### Node.js version

24.x

### MongoDB version

8.x

### Operating system

None

### Operating system version (i.e. 20.04, 11.3, 10)

_No response_

### Issue

I want to have the date field in my schema, but only as dd/mm/yyyy. A date object or it's derived string won't cut it.

How can i disable please?