docs: Add description to 0.16 blog

Author: ntucker

website/blog/2026-04-01-v0.16-parallel-fetching-collection-move-lazy.md

@@ -1,6 +1,6 @@
 ---
 title: 'v0.16: Parallel Fetching, Collection.move, Lazy'
-description: TBD
+description: Parallel data loading with useFetch(), Collection.move for reordering across lists, and Lazy for deferred relationship denormalization
 authors: [ntucker]
 tags: [releases, rest, schema, collection]
 ---