Fulltext-search broken for individual-book search-inside

[mekarpeles]

This endpoint still works:
https://api.archivelab.org/search/books?q=test&fields=names,ids,hits&collections=texts (searches across all books)

However the https://api.archivelab.org/books/{user_id}/searchinside?q=test endpoint needs to be fixed.

This uses:
https://github.com/ArchiveLabs/api.archivelab.org/blob/master/server/api/archive.py#L80

And I believe @rchrd2 mentioned this endpoint may have changed slightly.