Function build_new_model 

pub fn build_new_model(
    file_path: &Path,
    gguf: Option<&GgufMetadata>,
    parser: &dyn GgufParserPort,
    origin: &ModelOrigin<'_>,
    added_at: DateTime<Utc>,
) -> NewModel

Build the NewModel row for a model being added, from either the local-file or HuggingFace path.

The single place that decides a model’s stored name, parameter count, tags, and capability flags, so both add paths produce the same result for the same GGUF file. gguf is None only when the header could not be parsed — tolerated on the download path; the local-file path validates first and always passes Some.