Function perceived_fact_quin 

pub fn perceived_fact_quin(
    environment: u64,
    standpoint: u64,
    fact_id: u64,
    dominant_hz: f32,
    energy: f32,
) -> NQuin

Build the discrete percept→fact NQuin: where sensed (subject = environment), the percept stamp (P_PERCEIVED), what (object = fact_id), the consenting standpoint (context), and the dominant-Hz / energy scalars in metadata. No raw audio — only this discrete fact.