Function parse_files 

pub fn parse_files(
    paths: &[PathBuf],
    min_node_count: usize,
    min_line_count: usize,
) -> (Vec<CodeUnit>, Vec<String>)

Parse multiple files and collect all code units, skipping files that fail to parse.

This is a lower-level convenience function. Prefer using crate::rust::rust_analyzer::RustAnalyzer with crate::analysis::analyze for the full pipeline.