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/host-agent/env.example

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+# Copy to:  ~/.config/taler-monitoring/env
+# This file is NOT inside the git tree and is never overwritten by update-suite.sh.
+#
+# Full stack examples (same reporting generation for all):
+#   env/hacktivism.env.example
+#   env/stagepaysan.env.example
+#   env/francpaysan.env.example
+#
+# SUITE_GIT_URL=https://git.hacktivism.ch/hernani/koopa-admin-log.git
+# SUITE_GIT_REF=main
+# SUITE_DIR=$HOME/src/koopa-admin-log
+# SUITE_UPDATE_MODE=reset
+#
+# TALER_DOMAIN=hacktivism.ch
+# INSIDE_PODMAN=1
+# INSIDE_MODE=local-podman
+# CONTINUE_ON_ERROR=1
+# PHASES for the *default* hacktivism timer only (urls inside versions).
+# Dedicated wrappers always override PHASES + HTML paths:
+#   run-surface-monitoring.sh  → /taler-monitoring-surface*
+#   run-aptdeploy-monitoring.sh → /taler-monitoring-aptdeploy*
+# PHASES="urls inside versions"
+# RUN_TIMEOUT=600
+# HTML_OUT=$HOME/monitoring-sites-staging
+# MON_HOSTS="bank.hacktivism.ch exchange.hacktivism.ch taler.hacktivism.ch"
+# SOURCE_REPO_WEB=https://git.hacktivism.ch/hernani/koopa-admin-log