fix: stop existing pulse-sensor-proxy service before binary update

When installing temperature monitoring for a new container, stop any
existing pulse-sensor-proxy service before trying to overwrite the
binary. This prevents 'Text file busy' errors when the binary is
currently running.

Fixes the error that occurred when installing container 103 while
container 107's proxy was still running.

install.sh

@@ -1284,6 +1284,13 @@ create_lxc_container() {
         if [[ -f "$proxy_script" ]]; then
             chmod +x "$proxy_script"
 
+            # Stop existing pulse-sensor-proxy service if running to allow binary update
+            if systemctl is-active --quiet pulse-sensor-proxy 2>/dev/null; then
+                print_info "Stopping existing pulse-sensor-proxy service to update binary..."
+                systemctl stop pulse-sensor-proxy 2>/dev/null || true
+                sleep 1
+            fi
+
             # If building from source, copy the binary from the LXC instead of downloading
             local proxy_install_args=(--ctid "$CTID" --skip-restart)
             if [[ "$BUILD_FROM_SOURCE" == "true" ]]; then