Function pamoja_calibration_linear 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn pamoja_calibration_linear(
    scale: f32,
    offset: f32,
) -> *mut PamojaCalibration

Creates a calibration applying raw * scale + offset.

Returns

A handle the caller must release with pamoja_calibration_free.

Safety

The returned handle must be freed exactly once.