Use larger batches for faster search.

src/main.rs

@@ -76,6 +76,8 @@ fn search_media_items(
             .media_items()
             .search(SearchMediaItemsRequest {
                 album_id: Some(album_id.clone()),
+                // 100 is the documented max.
+                page_size: Some(100),
                 page_token,
                 ..Default::default()
             })