Record chat-source-adapter and chat-source-room when observing chat-history
Add TODO regarding lens library for core.config
Add yetibot.core.repl/start-offline for offline dev
Record chat-source-adapter and chat-source-room in history observer
Allow commands to "consume" subsequent commands in the pipeline

e.g. `history | grep` - this is way more efficient to implement in a datomic
query.