Research to see if we need to keep or repurpose subscribe, getSubscribers

[SomeMoosery]

Now that we are managing most of the client connections within WebSocket pools, we should see if we can repurpose Subscribe(...) and GetSubscribers(...) (and a few others from the caching service) to either minimally interact with Redis to make this more distributed in nature. Or, maybe we can just entirely get rid of them... 🤔