fix(observability): use exact slug path matching to prevent substring collisions

Git-Session-Id: 55aba88a-b4a8-42a6-95f2-84f564c0dcc1

Author: TimeToBuildBob

observability.pug

@@ -42,9 +42,11 @@ main.container.mx-auto.px-4.py-8
       .grid.gap-4
         | {% for slug in anchor_slugs %}
         |   {% assign matched_post = nil %}
+        |   {% assign slug_path = '/' | append: slug | append: '/' %}
         |   {% for post in site.posts %}
-        |     {% if post.url contains slug %}
+        |     {% if post.url contains slug_path %}
         |       {% assign matched_post = post %}
+        |       {% break %}
         |     {% endif %}
         |   {% endfor %}
         |   {% if matched_post %}