Add to Observations/Thoughts - Numaflow Rewrite in Rust

Signed-off-by: Vigith Maurice <[email protected]>

Author: vigith

draft/2025-08-20-this-week-in-rust.md

@@ -46,6 +46,7 @@ and just ask the editors to select the category.
 ### Project/Tooling Updates
 
 ### Observations/Thoughts
+* [Rewriting Numaflow’s Data Plane: A Foundation for the Future](https://blog.numaproj.io/rewriting-numaflows-data-plane-a-foundation-for-the-future-a64fd2470cf0)
 
 ### Rust Walkthroughs