chore: add REUSE license headers to port-forward crate

Author: kvinwang

port-forward/Cargo.toml

@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: © 2024-2025 Phala Network <dstack@phala.network>
+#
+# SPDX-License-Identifier: Apache-2.0
+
 [package]
 name = "dstack-port-forward"
 version.workspace = true

port-forward/src/lib.rs

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: © 2024-2025 Phala Network <dstack@phala.network>
+//
+// SPDX-License-Identifier: Apache-2.0
+
 use std::collections::HashMap;
 use std::net::{IpAddr, SocketAddr};
 

port-forward/src/tcp.rs

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: © 2024-2025 Phala Network <dstack@phala.network>
+//
+// SPDX-License-Identifier: Apache-2.0
+
 use std::net::SocketAddr;
 use std::os::unix::io::{AsFd, AsRawFd, BorrowedFd, OwnedFd};
 

port-forward/src/udp.rs

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: © 2024-2025 Phala Network <dstack@phala.network>
+//
+// SPDX-License-Identifier: Apache-2.0
+
 use std::collections::HashMap;
 use std::net::SocketAddr;
 use std::sync::Arc;