Integrate metrics from metrics.json into the report pdf.

report_generator/template/report.html.j2

@@ -156,6 +156,10 @@
     <h2>{{ block.title }}</h2>
     {{ distribution(block.rows, block.legend) }}
   {% endfor %}
+
+  {% for metric in summary.metrics or [] %}
+    {{ card(metric.title, metric.rows) }}
+  {% endfor %}
 {% endif %}
 
 {% if critical %}