Add JavaDoc to reach 100% coverage for public interfaces

While metrics-bot isn't intended to be used as a library, documentation is always helpful and should be added wherever it makes sense.

added component::archived/metrics bot owner::irl points::1 priority::medium resolution::fixed severity::normal status::closed type::enhancement labels

I am not immediately working on this ticket. Reassigning to metrics-team to indicate this.

Trac:
Status: new to assigned
Owner: irl to metrics-team

Trac:
Points: N/A to 1

Will look at this this week.

Trac:
Cc: N/A to metrics-team
Status: assigned to accepted
Owner: metrics-team to irl

Fixed in https://gitweb.torproject.org/user/irl/metrics-bot.git/commit/?id=ccdcee9f3cccf25c2030ca2a99c8f1c9be7bffa9.

I have rebuilt and deployed the latest JavaDoc for metrics-bot to https://people.torproject.org/~irl/metrics-bot/

Trac:
Resolution: N/A to fixed
Status: accepted to closed

closed

changed time estimate to 8h