Function run_parse 

pub fn run_parse(
    config: &ParseConfig,
) -> (Vec<AggregatedDiagnostic>, Vec<String>, bool)

Run axon parse against a configured corpus. Returns a tuple (diagnostics, io_errors, truncated):

• diagnostics: every parse / lex / type error observed
• io_errors: files that couldn’t be read / glob-expanded
• truncated: true when max_errors capped the report