Function build_aprs_position_report_packet 

pub fn build_aprs_position_report_packet(
    source: &Ax25Address,
    latitude: f64,
    longitude: f64,
    symbol_table: char,
    symbol_code: char,
    comment: &str,
    path: &[Ax25Address],
) -> Ax25Packet

Like build_aprs_position_report but returns the unencoded [Ax25Packet] so callers can inspect, log, or route it before wrapping it in KISS framing.