Function py_stream_tardis_funding_rates 

pub fn py_stream_tardis_funding_rates(
    filepath: PathBuf,
    chunk_size: usize,
    instrument_id: Option<InstrumentId>,
    limit: Option<usize>,
) -> PyResult<TardisFundingRateStreamIterator>

Streams funding rate updates from a Tardis derivative ticker CSV file.

Errors

Returns an error if chunk_size is outside [1, 1_000_000], or if loading or parsing the CSV file fails.