Calibre import. Fixes #627

[Ryuno-Ki]

No description provided.

[Ryuno-Ki]

What is needed to push this PR forward?
Or are you simply swamped and need some time?

[mouse-reeve]

I just need some time -- I'm dealing with some outside life stuff right now that has temporarily tanked my ability to do more than respond to questions at the moment. But I'm excited to review this when I have a brain that can read code back in my head :)

[Ryuno-Ki]

Alright. Take your time.

I'm looking into picking up another issue in the meantime.

[mouse-reeve]

I'm hitting an error when I run this -- django.db.utils.IntegrityError: null value in column "published_date" of relation "bookwyrm_status" violates not-null constraint

It looks like what's happening is that when the importer tries to create a ReviewRating from the star rating in the csv line, it can't find a published date to go with it. I think timestamp should be that field? If you add timestamp to the list of aliases for the date_added column, I think that will fix it

[mouse-reeve]

(The requested changes are the comment above, I'm just updating the state so it's easier for me to keep track of PRs)

[Ryuno-Ki]

I believe I've addressed the issue.
When importing, I got another error about the imported date already containing a timezone (it is aware, according to pytz) and addressed it, too.

However, I couldn't run black here due to https://stackoverflow.com/questions/71673404/importerror-cannot-import-name-unicodefun-from-click

[mouse-reeve]

Looks great! Thanks so much for the fixes