Add scheduled X post fetcher deployment

deploy/fetch-x.service

@@ -0,0 +1,21 @@
+[Unit]
+Description=Fetch selected X posts into SQLite
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=oneshot
+User=fetchx
+WorkingDirectory=/opt/fetch-x
+EnvironmentFile=/etc/fetch-x/fetch-x.env
+ExecStart=/usr/bin/python3 /opt/fetch-x/fetch_x_posts.py @OpenAI @XDevelopers
+StandardOutput=journal
+StandardError=journal
+
+# Avoid a hung API request blocking a subsequent scheduled run indefinitely.
+TimeoutStartSec=10min
+NoNewPrivileges=true
+PrivateTmp=true
+ProtectSystem=strict
+ProtectHome=true
+ReadWritePaths=/opt/fetch-x