CRANlogs API outages or rate limiting causing incorrect (0) download count

[stevecondylios]

Cloud process should be made resilient against cranlogs api outages.

[stevecondylios]

This is happening more frequently than first thought, which may indicate rate limiting rather than outages.

See 74d8f0a02fbb13a6eb95be1ffeb7d65fa1bf3e9d for an example (scroll to bottom of cran-libraries.json)