Function load_aot_native 

pub fn load_aot_native(
    path: &Path,
    symbol: &str,
    arity: usize,
) -> Option<(Box<dyn NativeFn>, Arc<AtomicU64>)>

dlopen path and resolve the AOT-native symbol (logos_native_<fn>) as an all-Int function of arity, wrapping it as a NativeFn plus its shared call counter. Returns None if the library or symbol cannot be loaded (the caller then keeps the function on VM+JIT — no gap at the seam).