refactor: unify names of the feature field of MultimodalDataItem (#8075)

python/sglang/srt/models/internvl.py

@@ -510,7 +510,7 @@ class InternVLChatModel(nn.Module):
         Returns:
             image_features (`torch.Tensor`): Image feature tensor of shape `(num_images, image_length, embed_dim)`).
         """
-        pixel_values = torch.cat([item.pixel_values for item in items])
+        pixel_values = torch.cat([item.feature for item in items])
         image_features = self.extract_feature(pixel_values)
         return image_features