Function parse_and_validate 

pub fn parse_and_validate() -> Result<ValidatedCli, ParseError>

Parse and validate CLI arguments

This function combines parsing and validation:

1. Parse CLI with clap
2. Validate all paths with SecureArgParser
3. Validate all numeric values
4. Return ValidatedCli on success

Returns

ValidatedCli with all arguments security-checked

Errors

Returns ParseError if any validation fails