pub const FN_ID_NUB_INVOKE_CACHED: u32 = 3;Expand description
fn_id for the cache-based RPC. Payload is a
InvokePacket (host-side #[repr(C)] bytes, no rkyv); the
guest dereferences cache VAs by instance_hash lookup, runs the
JIT, and replies with rkyv-archived InvocationResult.