Syncs the weillcornell card and figure on the Hub with the reviewed state on GitHub (open-h/OpenH-RF).
The Data Validation section embedded `ac1_15m_SK_pipeline.png` from the folder root, where the file has never existed on the Hub, so the figure was broken. It now points at `assets/`, and the figure — the reference zea reconstruction of `ac1_15m_SK` frame 0 on the common 597 x 300 grid — is uploaded there. Nothing else changed.
Files changed: 2.
```
+ weillcornell/assets/ac1_15m_SK_pipeline.png
~ weillcornell/README.md
```
