feat(todos): mark benchmark tests as completed

* Updated TODO list to reflect completion of benchmark tests.

Author: atasoglu

TODO

@@ -66,7 +66,7 @@
 - [x] Batch update operation
 - [x] Lazy loading option
 - [ ] Index strategy documentation
-- [ ] Benchmark tests
+- [x] Benchmark tests
 
 ### New Features
 - [ ] Partial search on JSON metadata (JSON_EXTRACT)