{#
    Prometheus monitoring integration — single SPOT for all nginx vhosts.
    Included from basic.conf.j2, synapse.conf.j2, and any other custom vhost
    that participates in the monitoring stack.

    The outer guard emits this block only when:
      1. The prometheus role is deployed on this host ('web-app-prometheus' in group_names), AND
      2. Either this IS the prometheus vhost, OR the current app has prometheus
         declared as an enabled service dependency (is_docker_service_enabled).
    The service lookup cannot be used for the host-level check because
    web-app-prometheus is not a registered shared-service provider in the
    service registry.

    $app_id          — Ansible role ID attached as Lua metrics label.
    $container_name  — Docker container name for /healthz/live polling.
                       Callers may set {% set container_name = "..." %} before
                       this include to override the default (derived from the
                       canonical service key via get_entity_name).

    healthz.conf.j2     — /healthz/live + /healthz/ready + /_live_probe
    location.conf.j2    — log_by_lua_block per-request metrics collection
    metricz.conf     — /metricz scrape endpoint (prometheus domain only); no Jinja2 — lives in files/ not templates/
  #}
  {% if lookup('prometheus_integration_active', application_id) %}
  set $app_id "{{ application_id }}";
  {% if container_name is defined %}
  set $container_name "{{ container_name }}";
  {% else %}
  {% set prometheus_service_key = application_id | get_entity_name %}
  set $container_name "{{ lookup('config', application_id, 'services.' + prometheus_service_key + '.name', '') }}";
  {% endif %}
  {% include 'roles/web-app-prometheus/templates/nginx/healthz.conf.j2' %}
  {% include 'roles/web-app-prometheus/templates/nginx/location.conf.j2' %}
  {% if application_id == 'web-app-prometheus' %}
  {% include 'roles/web-app-prometheus/files/nginx/metricz.conf' %}
  {% endif %}
  {% endif %}