feat(*.php, *.psql): deduplicate API code + performance improvements

src/includes/blocks/dialog.liquid

@@ -9,9 +9,15 @@
 <button class="dialog-open client-side" aria-label="{{ label }}" data-dialog-trigger="{{ dialogId }}" data-dialog-button>
   {{ labelContent }}
 </button>
-<dialog id="dialog-{{ dialogId }}" class="client-side">
+<dialog
+  id="dialog-{{ dialogId }}"
+  class="client-side"
+  {% if dynamic %}data-dynamic="{{ dynamic }}"{% endif %}
+  {% if markdown %}data-markdown="{{ markdown }}"{% endif %}>
   <button class="dialog-close" aria-label="Close dialog" data-dialog-button>
     {% tablericon "circle-x" %}
   </button>
+  {%- unless dynamic -%}
   {{ content }}
+  {%- endunless -%}
 </dialog>

src/includes/home/recent-activity.liquid

@@ -15,12 +15,13 @@
          • {{ item.label }}
          <span class="client-side">
           {%- if item.notes -%}
-            {% assign notes = item.notes | prepend: "### Notes\n" | markdown %}
+            {% assign notes = item.notes | markdown %}
             {% render "blocks/dialog.liquid",
               icon:"info-circle",
               label:"View info about this concert"
-              content:notes,
-              id:item.content_date
+              dynamic:"optimized_concerts",
+              markdown:"concert_notes",
+              id:item.id
             %}
           {%- endif -%}
         </span>