The default Filo.Client.Transport, over Mint.
Mint is an optional dependency: it is not pulled in by depending on Filo, so a
host that only serves Hrana never pays for it. To use the client with this
transport, add {:mint, "~> 1.6"} to your deps (or pass your own :transport).
One owned HTTP/1 connection in passive mode, so the request/response round-trip is synchronous — the natural fit for a single sequential Hrana stream, with one such connection held per client process.