Card: add Versions changelog (v1.0.0)

README.md

@@ -53,3 +53,8 @@ Graphics Lab Motion Capture Database.
 
 `scripts/export-rmib-onnx.py` in the QtMeshEditor repo (one-time, offline; not
 shipped with the app).
+
+## Versions
+
+- **v1.0.0** (current) — initial RMIB in-betweening model trained on CMU MoCap
+  (22 core-body joints, ~421k windows; beats slerp by >2× on a held-out split).