Add AR int4 decode external data

.gitattributes

@@ -37,3 +37,4 @@ higgs_audio_v3_vocoder_decode.onnx.data filter=lfs diff=lfs merge=lfs -text
 higgs_audio_v3_vocoder_decode_matmul4.onnx.data filter=lfs diff=lfs merge=lfs -text
 tokenizer.json filter=lfs diff=lfs merge=lfs -text
 ar/higgs_audio_v3_ar_prefill_matmul4.onnx.data filter=lfs diff=lfs merge=lfs -text
+ar/higgs_audio_v3_ar_decode_matmul4.onnx.data filter=lfs diff=lfs merge=lfs -text

ar/higgs_audio_v3_ar_decode_matmul4.onnx.data

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:472a3c768ff01f0d8801d55d1d1e9a2acbccf68d0a9592f98081853773bb8598
+size 1926661760