Function report_text 

pub fn report_text(
    repo: &dyn Repo,
    args: &VennArgs,
    checkpoint: Option<(&str, Option<&str>)>,
) -> Result<String, VennError>

2026-09-29: Build and render the report args asks for. checkpoint, when the target was given as a checkpoint directory, is that directory’s config.json text and, if present, its hf_quant_config.json text.