[lib] Update entry reducer so thick entry infos are properly stored

Summary:
Discovered that thick raw entry infos weren't being stored as thick and this was because the reducer wasn't accounting for their fields. This diff allows thick raw entry infos to be stringified properly

Depends on D13315

Test Plan: Tested later in stack by being able to access thick field from entry info

Reviewers: marcin, tomek, ashoat

Reviewed By: tomek

Differential Revision: https://phab.comm.dev/D13339