Based on discussion in #3003.

• Since exiftool-vendored disables the print conversion for the Orientation tag, I believe that guarantees we can get only 1-8 values for the orientation of photos.
• ffprobe returns other values for the orientation (-90, 90, etc.)

We can change the type of the orientation field in ExifEntity and ExifResponseDto to enum to provide a better experience for all the clients.