A few stability improvements. Added Fenrir ssh announcement script.

pi4/files/etc/systemd/system/ssh-login-monitor.service

@@ -0,0 +1,17 @@
+[Unit]
+Description=Fenrir SSH Login Monitor
+After=sshd.service
+Wants=sshd.service
+
+[Service]
+Type=simple
+ExecStart=/usr/share/fenrirscreenreader/scripts/ssh-login-monitor.sh
+Restart=on-failure
+RestartSec=5
+
+# Security settings
+NoNewPrivileges=true
+PrivateTmp=false
+
+[Install]
+WantedBy=multi-user.target