Add demo data and ablation videos

.gitattributes

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 *.zip filter=lfs diff=lfs merge=lfs -text
 *.zst filter=lfs diff=lfs merge=lfs -text
 *tfevents* filter=lfs diff=lfs merge=lfs -text
+data/ablation/stage1.mp4 filter=lfs diff=lfs merge=lfs -text
+data/ablation/stage2.mp4 filter=lfs diff=lfs merge=lfs -text
+data/test/faces/demo_000001_faces.mp4 filter=lfs diff=lfs merge=lfs -text
+data/test/frames/demo_000001.png filter=lfs diff=lfs merge=lfs -text
+data/test/poses/demo_000001_poses.mp4 filter=lfs diff=lfs merge=lfs -text
+data/train/faces/sample_000001_faces.mp4 filter=lfs diff=lfs merge=lfs -text
+data/train/poses/sample_000001_poses.mp4 filter=lfs diff=lfs merge=lfs -text
+data/train/videos/sample_000001.mp4 filter=lfs diff=lfs merge=lfs -text

data/README.md

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+# Minimal Data
+
+This directory contains a tiny smoke-test dataset for checking training and inference wiring.
+
+## Training
+
+`train/metadata.csv` contains one training sample with the same columns expected by `examples/wanvideo/model_training/train_svi.py`:
+
+```text
+video,prompt,animate_pose_video,animate_face_video
+```
+
+The paths in the CSV are relative to `data/train/`.
+
+The toy training videos are stored with normalized sample names:
+
+```text
+videos/sample_000001.mp4
+poses/sample_000001_poses.mp4
+faces/sample_000001_faces.mp4
+```
+
+## Inference
+
+`test/` contains a single inference case:
+
+```text
+frames/demo_000001.png
+poses/demo_000001_poses.mp4
+faces/demo_000001_faces.mp4
+```
+
+This matches the default layout used by the top-level `inference.sh`.
+
+## Ablation
+
+`ablation/` contains the two-stage ablation outputs:
+
+```text
+ablation/stage1.mp4
+ablation/stage2.mp4
+```

data/ablation/stage1.mp4

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data/train/metadata.csv

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+video,prompt,animate_pose_video,animate_face_video
+videos/sample_000001.mp4,A person is moving naturally.,poses/sample_000001_poses.mp4,faces/sample_000001_faces.mp4

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