Function validate_patch_caps 

pub fn validate_patch_caps(
    files_changed: usize,
    total_lines_changed: usize,
    per_file_lines: &[usize],
    max_files: usize,
    max_total_lines: usize,
    max_per_file: usize,
) -> Vec<Violation>

Validates patch caps (max files, max total lines, max lines per file).