rescue all exceptions for metrics

[orioldsm]

Currently because the rescue only captures StandardError type errors, we're not getting into the rescue block for all of the issues Sidekiq workers are experiencing.

This PR:

• Changes rescue StandardError => e to now be rescue Exception => e to properly handle gathering stats for all potential error types. The error is re-raised at the end of the rescue so there is no need for concern in widening the umbrella of what we're catching.
• Adds an error tag to the DataDog stats reported so we can get granular data on what error types our worker's are experiencing

[hkim3163]

👍 cool with rescuing exception & raising

let's give this a shot in prod