maint: Add some extra logging to pubsub systems

[kentquirk]

Which problem is this PR solving?

• Add a bit more logging to redis stuff to make it easier to diagnose
• Closes Add a lot more diagnostics during startup before Refinery is running. #1277

Short description of the changes

• Add some logging in pubsub
• Delete an unused function

[cartermp]

Is there a way to also dump (maybe with a flag?) the config and rules config to stdout on startup? This would help field teams a bunch.

[kentquirk]

We have the ability to query the config through an endpoint if you specify the debug flag.

What you ask for is possible, but how/why is it different than reading the config files directly? Those are also specified on the command line.

[cartermp]

In a chat with @irvingpop he mentioned that it's often a struggle to get the actual config/rules used in a given refinery run, and there's more hopping back and forth with "wait, this doesn't match what you're saying, are you sure this is right?" than they'd like. @irvingpop is that a fair assessment?

[VinozzZ]

LGTM. The test failed in CI is due to missing logger initialization in pubsub test data