pub fn detect_format_version(edifact: &str) -> Result<DetectResult, DetectError>Expand description
Detect the BDEW format version of an EDIFACT message.
Performs a single-pass scan of the input, captures the first UNH segment’s
S009 version, and looks (message_type, unh_version) up in a static table.
Scanning stops after the first UNH, so multi-message interchanges are
detected from the first message only.