feat: add automatic media normalization, R2 retention cleanup, and seamless playout loops

README.md

@@ -46,6 +46,8 @@ flowchart TD
     P -->|sync| R2
 ```
 
+A detailed description of the Streaming architecture, playout, and delivery is available in [`docs/STREAMING.md`](docs/STREAMING.md).
+
 ## Project Structure
 
 This structure directly reflects the building blocks, runtime flows, deployment view, and cross-cutting concepts defined in the arc42 documentation.