Bug: Metadata Import not saving all fields

[adam-rozen]

Importing books from ISBN file does not add any series to the books, even when the rest of the metadata is fetched correctly. It also only saves the Google identifier, not the Amazon or Goodreads ones. This information is fetched and saved correctly when importing 1 book at a time via Add Book page. However, when adding a book using that page, the Google identifier is not saved.

I used the default metadata provider and have observed this behavior in 0.60.1 and 0.60.2 via Docker. This happened multiple times and for multiple imports.