fix(glance): preserve glance.yml across updates

CLEAN_INSTALL wipes /opt/glance without restoring user config; back up and restore glance.yml around the prebuild deploy.

Co-authored-by: Cursor <cursoragent@cursor.com>

ct/glance.sh

@@ -34,8 +34,20 @@ function update_script() {
     systemctl stop glance
     msg_ok "Stopped Service"
 
+    if [[ -f /opt/glance/glance.yml ]]; then
+      msg_info "Backing up glance.yml"
+      cp /opt/glance/glance.yml /tmp/glance.yml.bak
+      msg_ok "Backed up glance.yml"
+    fi
+
     CLEAN_INSTALL=1 fetch_and_deploy_gh_release "glance" "glanceapp/glance" "prebuild" "latest" "/opt/glance" "glance-linux-amd64.tar.gz"
 
+    if [[ -f /tmp/glance.yml.bak ]]; then
+      msg_info "Restoring glance.yml"
+      mv /tmp/glance.yml.bak /opt/glance/glance.yml
+      msg_ok "Restored glance.yml"
+    fi
+
     msg_info "Starting Service"
     systemctl start glance
     msg_ok "Started Service"