Function decode_nautilus_instrument_id 

pub fn decode_nautilus_instrument_id(
    record: &RecordRef<'_>,
    metadata: &mut MetadataCache,
    publisher_venue_map: &IndexMap<PublisherId, Venue>,
    symbol_venue_map: &AHashMap<Symbol, Venue>,
) -> Result<InstrumentId>

Decodes a Databento record into a Nautilus InstrumentId.

Errors

Returns an error if:

• The publisher cannot be extracted from the record.
• The publisher ID is not found in the venue map.
• The underlying instrument ID mapping fails.