Function parse_numeric 

pub fn parse_numeric<T>(value_str: &str) -> Result<T, CoreError>
where
    T: FromStr,
    T::Err: Display,

Parse numeric value from ASS field with validation

Handles integer and floating-point parsing with ASS-specific validation. Provides better error messages than standard parsing.

Errors

Returns an error if the string cannot be parsed as the target numeric type.