Add metadata to model card

This PR adds the missing YAML metadata (`pipeline_tag` and `license`) to the model card so the model is properly categorized on the Hub. No content changes are made beyond the metadata.

README.md

@@ -1,3 +1,8 @@
+---
+license: apache-2.0
+pipeline_tag: image-classification
+---
+
 <h2 align="center">
   Venus-DefakerOne2: A Vision-Forensics Foundation Model<br>
   with Broader Coverage
@@ -72,4 +77,4 @@ CUDA_VISIBLE_DEVICES=0 MIN_PIXELS=262144 MAX_PIXELS=2408448 --model [model_weigh
       primaryClass={cs.CV},
       url={https://arxiv.org/abs/2610.37918}, 
 }
-```
+```