Add Transformers + Torch to Space runtime requirements

requirements.txt

@@ -10,3 +10,10 @@ scikit-learn>=1.3.0
 
 # optional Azure integration
 azure-ai-textanalytics>=5.3.0
+
+# ML pipeline
+transformers>=4.41.0
+torch>=2.2.0
+safetensors>=0.4.0
+accelerate>=0.33.0
+sentencepiece>=0.2.0