Move wsssh-tools .deb to /var/cache location

- Moved .deb from /tmp to /var/cache to avoid potential cleanup issues
- Updated hook to look for package in /var/cache/
- This should ensure the file is available during hook execution

config/hooks/live/9970-install-wsssh-tools.hook.chroot

@@ -5,8 +5,8 @@ set -e
 
 echo "Installing wsssh-tools .deb package..."
 
-# wsssh-tools .deb package is already available in /tmp from config/includes.chroot/tmp/
-WSSSH_DEB="/tmp/wsssh-tools_1.0.0-1_amd64.deb"
+# wsssh-tools .deb package is available in /var/cache from config/includes.chroot/var/cache/
+WSSSH_DEB="/var/cache/wsssh-tools_1.0.0-1_amd64.deb"
 
 echo "Checking wsssh-tools at $WSSSH_DEB..."
 if [ ! -f "$WSSSH_DEB" ]; then