Prune commentary and stale Rust port notes

scripts/test-wg-tunnel.sh

@@ -35,7 +35,6 @@ SERVER_UDP_IP=10.99.0.1
 CLIENT_UDP_IP=10.99.0.2
 LISTEN_PORT=51820
 KEYDIR=/run/ai-app-wg-test
-# This script lives in scripts/; everything it names is under the root.
 REPO=$(cd "$(dirname "$0")/.." && pwd)
 
 up() {
@@ -62,9 +61,7 @@ up() {
     sudo ip addr add "$SERVER_WG_IP/24" dev "$WG_SERVER"
     sudo ip link set "$WG_SERVER" up
 
-    # Created in the main namespace, then moved: a wireguard interface keeps
-    # its UDP socket in the namespace it was born in, which is exactly what
-    # lets the "phone" reach the server's veth address from inside its own.
+    # Moving the interface preserves its birth namespace's UDP socket.
     echo "==> Creating $WG_CLIENT (phone side, $CLIENT_WG_IP) in netns '$NS'"
     sudo ip link add "$WG_CLIENT" type wireguard
     sudo ip link set "$WG_CLIENT" netns "$NS"