fix: comprehensive script audit - bug fixes and optimizations

- ct/invidious.sh: fix copy-paste bug (OxiCloud code in update block)
- install/invidious-install.sh: fix sed redirect, service filename mismatch
- ct/forgejo-runner.sh: fix binary download path, bump Debian to 13
- ct/authentik.sh: add -f flag to curl (fail on HTTP errors)
- ct/localagi.sh: add -f flag to curl, add installation check guard
- ct/ente.sh: fix broken install check (/var -> /opt/ente), apt-get -> apt
- ct/garmin-grafana.sh: add explicit tarball mode to fetch_and_deploy
- install/garmin-grafana-install.sh: fix local outside function, add tarball mode
- install/ente-install.sh: uncomment cleanup_lxc
- install/github-runner-install.sh: add missing , fix msg_info text
- ct/step-ca.sh: remove duplicate success message
- ct/devuan.sh, ct/ubuntu.sh: apt-get -> apt, remove duplicate msg_ok

install/garmin-grafana-install.sh

@@ -54,7 +54,7 @@ msg_ok "Installed Grafana"
 
 msg_info "Configuring Grafana"
 GRAFANA_PASS=$(openssl rand -base64 18 | tr -dc 'a-zA-Z0-9' | cut -c1-13)
-local retries=0
+retries=0
 while ! grafana-cli admin reset-admin-password "${GRAFANA_PASS}" &>/dev/null; do
   ((retries++))
   [[ $retries -ge 30 ]] && break
@@ -64,7 +64,7 @@ $STD grafana-cli plugins install marcusolsson-hourly-heatmap-panel
 $STD systemctl restart grafana-server
 msg_ok "Configured Grafana"
 
-fetch_and_deploy_gh_release "garmin-grafana" "arpanghosh8453/garmin-grafana"
+fetch_and_deploy_gh_release "garmin-grafana" "arpanghosh8453/garmin-grafana" "tarball"
 
 msg_info "Configuring garmin-grafana"
 mkdir -p /opt/garmin-grafana/.garminconnect