[lib] Send new user inconsistencies to the reports service

Summary:
User reducer should return reduced store and new inconsistencies which are then passed to reports reducer.

https://linear.app/comm/issue/ENG-5162/start-sending-user-inconsistency-reports-to-the-server

Test Plan: Generate an inconsistency by modifying server state and check if the report is sent to the service and saved in the db.

Reviewers: kamil, bartek, inka

Reviewed By: bartek

Subscribers: ashoat, wyilio

Differential Revision: https://phab.comm.dev/D9417