[lib] Refactor integrity reducer to process threadStore ops with sqlite ops

Summary:
Refactor integrity reducer to use sqlite ops

Depends on D11287

Test Plan: flow check. Not sure how to best test this right now. Might need to test later in diff stack

Reviewers: kamil, tomek, michal

Reviewed By: kamil, michal

Subscribers: michal, ashoat

Differential Revision: https://phab.comm.dev/D11298