Function log_task 

pub async fn log_task(
    log_file: PetriLogFile,
    reader: impl AsyncRead + Unpin + Send + 'static,
    name: &str,
) -> Result<()>

Logs lines from reader into log_file.

Attempts to parse lines as SyslogParsedEntry, extracting the log level. Passes through any non-conforming logs.