Serialize Results Object

This involves "writing results to file, how about you put that?"

AST Engine will write to local/mounted storage...do we want a seperate job to move to object storage? Or should it just go to object storage in the first place.

Start with the AST Engine's existing results-writing path and determine how it currently handles local or mounted storage. Compare the two options raised in the issue—writing directly to object storage or using a separate transfer job—and document the chosen behavior and completion criteria.

Written by the indexing model from the issue text.