Sentry doesn't capture errors that happen in background jobs

[orlando]

What: Sentry doesn't capture errors that happen in background jobs. I'm not sure why this doesn't work out of the box, since Sentry is supposed to work with Sidekiq, but we might need to initialize something else since we are adding this via plugin.

Why: We need visibility of these errors too

[saulshanabrook]

I am also looking into how to support capturing the errors for background jobs... I tried to modify the 100-sidekiq.rb initializer which is loaded in sidekiq processes, but that didn't seem to work.