Method invoke

src/fl/remote/rpc/rpc.cpp.hpp:53–56

    // Create a placeholder invoker (actual invocation handled in handle())
    struct PlaceholderInvoker : public detail::ErasedInvoker {
        fl::tuple<TypeConversionResult, json> invoke(const json&) override {
            // Should not be called - handle() will call mResponseAwareFn directly
            return fl::make_tuple(TypeConversionResult::success(), json(nullptr));
        }
    };
    entry.mInvoker = fl::make_shared<PlaceholderInvoker>();