Function run_transform_pairs 

pub fn run_transform_pairs(
    registry: &Registry,
    presets: &PresetLookup,
    name: &str,
    pairs: Vec<(String, String)>,
    buf: AudioBuffer,
    ctx: &mut OpCtx<'_>,
) -> Result<AudioBuffer>

Run a named transform with raw pairs (used by fx chains, pipelines, and composite ops).