lessons

• postgres tables for logging where you write a row after you've done something is a great honkin idea and I love them. log ALL the things. log http response statuses/durations, even bodies for requests that cost money/are esoteric.
• a generic persistent kv in postgres is also super useful (eg solid_cache)
• even though you can't log all the entities you're operating on, maybe you can log the number - eg how many domains did this query return at this time? how many rows did I cache in this cache job?