Function init_logger_once

src/telemetry.rs:203–205

Initialize the global telemetry logger if not already initialized, returning the existing or new logger. This is the thread-safe path: creation and registration happen atomically inside OnceLock, so concurrent calls cannot produce duplicate worker threads.

(log_dir: PathBuf)

/// atomically inside OnceLock, so concurrent calls cannot produce
/// duplicate worker threads.
pub fn init_logger_once(log_dir: PathBuf) -> &'static TelemetryLogger {
    LOGGER.get_or_init(|| TelemetryLogger::new(log_dir))
}

/// Get a reference to the global logger, if initialized.
fn logger() -> Option<&'static TelemetryLogger> {