docs: dataset card for sdcpp gallery

README.md

@@ -23,4 +23,4 @@ images/
   wan/<id>.png
 ```
 
-Sidecar JSON keeps prompt, seed, steps, and size. GitHub Pages rebuilds a paginated gallery from these files.
+Sidecar JSON keeps prompt, seed, steps, size, run duration, GPU name, CUDA version, and torch version. GitHub Pages rebuilds a paginated gallery from these files.