feat: Add changelog tracking to attribute definitions

docs/src/components/AttributeCard.astro

@@ -114,6 +114,30 @@ const rawJson = JSON.stringify(attribute, null, 2);
     )}
   </div>
 
+  {attribute.changelog && attribute.changelog.length > 0 && (
+    <details class="mt-4 pt-3 border-t border-border group">
+      <summary class="cursor-pointer list-none flex items-center gap-2 text-sm text-text-muted transition-colors duration-fast hover:text-text-secondary">
+        <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" class="transition-transform duration-fast group-open:rotate-90">
+          <path d="M9 18l6-6-6-6"/>
+        </svg>
+        Changelog
+      </summary>
+      <div class="mt-3 flex flex-col gap-2">
+        {attribute.changelog.map((entry) => (
+          <div class="flex items-baseline gap-3 text-sm">
+            <span class="px-2 py-0.5 bg-bg-elevated border border-border rounded-sm text-xs font-mono text-text-secondary">{entry.version === 'next' ? 'next' : `v${entry.version}`}</span>
+            {entry.prs && entry.prs.length > 0 && entry.prs.map((pr) => (
+              <a href={`https://github.com/getsentry/sentry-conventions/pull/${pr}`} class="text-xs text-accent hover:underline">#{pr}</a>
+            ))}
+            {entry.description && (
+              <span class="text-xs text-text-muted">{entry.description}</span>
+            )}
+          </div>
+        ))}
+      </div>
+    </details>
+  )}
+
   <details class="mt-4 pt-3 border-t border-border group">
     <summary class="cursor-pointer list-none flex items-center gap-2 text-sm text-text-muted transition-colors duration-fast hover:text-text-secondary">
       <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" class="transition-transform duration-fast group-open:rotate-90">

docs/src/content.config.ts

@@ -24,6 +24,15 @@ const attributeSchema = z.object({
     .optional(),
   alias: z.array(z.string()).optional(),
   sdks: z.array(z.string()).optional(),
+  changelog: z
+    .array(
+      z.object({
+        version: z.string(),
+        prs: z.array(z.number().int().positive()).optional(),
+        description: z.string().optional(),
+      }),
+    )
+    .optional(),
 });
 
 // Schema matching schemas/name.schema.json