[lib] Include timestamps inside CreateThickRawThreadInfoInput

Summary:
When a user is added to a thread, they should get the correct timestamps instead of assuming that thread creation time or operation time are correct.

https://linear.app/comm/issue/ENG-9124/send-timestamps-in-existingthreaddetails

Depends on D13218

Test Plan: Create an operation with the creation of a new thread. Check if the timestamps are correct.

Reviewers: kamil, inka

Reviewed By: inka

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D13219