monitoring: host-agent HTML, surface, aptdeploy, sticky bar

Complete taler-monitoring host-agent (hacktivism/surface/aptdeploy timers),
site-gen console HTML with sticky status bar and collapsible scope, apt-src
deploy tests, remote surface inventory, and Caddy monitoring handle snippets.

scripts/taler-monitoring/site-gen/pull-firecuda-to-koopa.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+# pull-firecuda-to-koopa.sh — copy HTML from firecuda work dir → koopa staging
+# Run on laptop (hernani) where both SSH aliases work.
+set -euo pipefail
+FIRECUDA="${FIRECUDA_SSH:-firecuda-external}"
+KOOPA="${DEPLOY_SSH:-koopa-external}"
+REMOTE_HTML="${FIRECUDA_HTML:-var/taler-monitoring-sites-work/html/}"
+STAGE="${DEPLOY_STAGING:-/home/hernani/monitoring-sites-staging}"
+
+echo "firecuda:$REMOTE_HTML → $KOOPA:$STAGE"
+ssh -o BatchMode=yes -o ConnectTimeout=20 "$KOOPA" "mkdir -p '$STAGE'"
+rsync -az --delete \
+  "${FIRECUDA}:${REMOTE_HTML}" \
+  "${KOOPA}:${STAGE}/"
+echo "OK staged. Root: rsync to /var/www/monitoring-sites (see ROOT-ON-KOOPA.md)"