Function parse_tick_csv 

pub fn parse_tick_csv(
    path: &Path,
    exchange: &str,
    symbol: &str,
    source_offset: &FixedOffset,
) -> Result<(Vec<Tick>, Vec<String>)>

Parse a tab-delimited tick CSV into Vec<Tick>.

Malformed rows produce warnings instead of hard errors so partial files can still be imported.