feat(members): add member ID to members list

This commit introduces a 'Member ID' column to the members table, making it the first column for easy reference.

- The member data schema and sample CSV have been updated to include the `memberId`.
- The members page now displays the `memberId` for each member.
- Additionally, a version query string has been added to the hero image URL to force a cache refresh.

app/pages/index.vue

@@ -4,7 +4,7 @@
     <UPageHero
       class="bg-cover bg-center"
       style="
-        background-image: url(&quot;/hero-image-2.jpg&quot;);
+        background-image: url(&quot;/hero-image-2.jpg?v=2&quot;);
         background-position-y: -40px;
         background-repeat: no-repeat;
         background-color: rgba(255, 255, 255, 0.5); /* Semi-transparent black */