fix: pin versions

requirements.txt

@@ -1,7 +1,7 @@
-# PyTorch CPU instalado separado no Dockerfile (--index-url)
-transformers>=4.40.0
+transformers==4.46.0
+huggingface-hub==0.27.0
 fastapi>=0.110.0
 uvicorn[standard]>=0.27.0
 pydantic>=2.0
-accelerate
+accelerate==1.1.0
 sentencepiece