How to include full quality, source resolution version in my rendition ladder?

Not sure why the original source video at full quality and full resolution isn’t among the outputs that Bitmovin generated for my VOD for adaptive bitrate streaming using DASH.

As far as I can tell, there is no option to do this without creating an entire ladder. Not sure why this was moved from feature request to support.

It could be that Per-title detects that there is no gain in perceived quality by using the full image size. It could be the case for instance if your input file was generated from upscaling a smaller video.
Generating a larger rendition is nevertheless possible by using a manual ladder or by creating a regular (non-per-title) encoding job and omitting the image dimensions from the encoding configuration. In this case, the input dimensions should be duplicated.