[Sidekiq] Add description to deploy safely with long running background jobs

From the sidekiq documentation the recommendation seems to be to send a TSTP signal, and then the SIGTERM.

Any more info on this? (I found a couple of other posts on the topic, like Shutdown timetous for Sidekiq worker ) If I was running on a virtual server, I’d be able to login and send the signal to the running process. The only other idea I had was to to have an in-app signalling mechanism for the sidekiq worker to shut itself down. That could be triggered by the deploy process, currently triggered a Github Action in my case.

While I don’t have a critical need for it yet (hopefully soon), I’m wondering how other production workloads are handling frequent deploys that might kill running jobs.