Refactor stats endpoint so supports filtering people and make dashboard page utilise it

templates/dashboard.html

@@ -194,6 +194,10 @@
 
 </div>
 
-{{ render_partial('partials/stats.html', stats=model['Stats']) }}
+
+<div class="hidden" hx-get="{{ url_for('get_stats') }}"
+    hx-include="[name='exercise_id'],[name='min_date'],[name='max_date'],[name='person_id']" hx-trigger="load"
+    hx-target="#stats" hx-swap="innerHTML">
+</div>
 
 {% endblock %}