pub async fn connect_one(url: &str, application_name: &str) -> Result<Client>Expand description
Open a single connection using the same SSL fallback, auth retry, and
application-name path as create_pool.
For one-shot commands that open exactly one connection and exit (doctor sweeps, the patient-portal flag lookup in lifecycle subcommands, etc.). Internally builds a pool, takes one client out, then drops the pool. The returned client owns its connection driver task — it remains usable after the pool is gone.