Over time, I think we may end up having multiple services, so it seems like a good opportunity to name this one more specifically while the cost is low. It just seems like naming it "zed" and "zed-server" leaves it a bit open ended.
This increases the threshold at which we start loading new messages
as well as the amount of messages we get back from the server every
time we fetch.
Also, we restructured the seed binary to use the methods in `Db` to
generate seed data and added random chat messages.
Co-Authored-By: Nathan Sobo <nathan@zed.dev>
