Function decode_quantity 

pub fn decode_quantity(
    bytes: &[u8],
    precision: u8,
    field: &'static str,
    row: usize,
) -> Result<Quantity, EncodingError>

Decodes a [Quantity] from raw bytes with bounds validation.

Uses corrected raw values to handle floating-point precision errors in stored data. Sentinel values (QUANTITY_UNDEF) are preserved unchanged.

Errors

Returns an EncodingError::ParseError if the quantity value is out of bounds.