pub fn init_tracing(filter: Option<&str>, jsonl: bool) -> Result<()>Expand description
Initializes the global tracing subscriber.
Resolution order: RUST_LOG env > argument filter > DEFAULT_FILTER.
Output goes to stderr. When jsonl is true, each log record is emitted as one JSON
line (JSONL/NDJSON); otherwise human-readable text with ANSI colors auto-enabled when
stderr is a terminal.