API PATCH /me/progress/:id - allow providing createdAt and respect provided finishedAt when syncing progress

[justcallmelarry]

I was trying to make a script to set some of my old read books to done, but to avoid screwing up the stats i wanted to set them on a previous year.

I noticed some issues however, and during my research I found that there are some issues when creating and updating mediaProgress

• createdAt (or startedAt, as the api documentation states) was not respected at all at either during creation or update.
• finishedAt was not respected during creation, but can be updated after the initial call.

For the first issue, this allows createdAt to be set on creation but I could not figure out how to let it be updatable. My suspicion is that there is some magic going on which disallows the field createdAt to be updated due to sequelize default timestamps on their models.

For the second issue I just found where the finishedAt timestamp was overwritten on creation, and fixed the issue.