Show Reddit post age in conversations

src/main-loop.ts

@@ -256,6 +256,7 @@ export async function runMainLoop(app: AppContainer): Promise<void> {
             title: post.title,
             postUrl,
             imageUrl: postImageUrl,
+            postCreatedAt: post.created_utc * 1000,
             processedAt: Date.now(),
           });