usetracing_subscriber::{EnvFilter, fmt};/// Initialize structured logging. Safe to call multiple times — only the
/// first call installs the subscriber; subsequent calls are no-ops.
pubfninit(){let filter =EnvFilter::try_from_default_env().unwrap_or_else(|_|EnvFilter::new("info"));let_=fmt().with_env_filter(filter).with_target(true).try_init();}