pub fn init_tracing()Expand description
Initializes the process-wide tracing subscriber: a plain stderr formatter filtered by
RUST_LOG (default info). Idempotent and panic-free — uses try_init, so a second call (or a
test that already installed a subscriber) is a no-op rather than a panic. Call once at the top
of each binary’s main (the dispatcher and frontend; the CLI uses init_cli_tracing).