Bot to add ISBN 13 to items with only ISBN 10

[davidscotson]

There's large numbers of edition records that have an ISBN 10 entry but no corresponding ISBN 13 entry, even though it's possible to generate the longer one from the shorter.

This seems a good opportunity for a simple bot, though the potentially large number of items to be updated may mean that some other mechanism might be better suited.

I'll create a PR with a bot anyway.

[seabelis]

I don't see any issues with this so long as no existing information is overwritten.

[cdrini]

@xayhewalo I forget did we implement something like this as part of isbn bot?

[xayhewalo]

Looking at the source code, isbn10's are not moved. I even left a comment

openlibrary-bots/isbnbot/normalize_isbns.py

Line 59 in cbeb30b

# if an ISBN is in the wrong field this script will not move it to the appropriate one