Merge "Adjust Safety annotation but also just silence lint warning" into main

        /// Register Rust callbacks for connection events

        ///

        /// # Safety

        ///

        /// `callbacks` must be Send + Sync, since C++ moves it to a different thread and

        /// invokes it from several others (GD + legacy threads).

        #[allow(clippy::missing_safety_doc)]

        #[cxx_name = "RegisterRustCallbacks"]

        unsafe fn unchecked_register_rust_callbacks(

            self: Pin<&mut Self>,