Adding Downtime Reporting for Archive.org Imports

[mekarpeles]

Describe the problem that you'd like solved

https://openlibrary.org/admin/imports needs some sort of tracking to determine when archive.org imports are not running.

Proposal & Constraints / Requirements

We should be able to capture downtime at a daily resolution

Additional context

Stakeholders

[mekarpeles]

Also, 🥲 the admin import page graphs are broken / gone. out of scope of this issue

[cdrini]

Thoughts: We don't have any transparency on the crons at all. We don't know if they're running, when they did run, if they errored, or anything.

Potential improvements: Jenkins?

Imports specifically:

• Graphite ping for every book-related import action. Something like: stats.ol.importbot.{created,matched,failed}

^^ This seems like the best approach for now.