Update endpoint docs and runtime dependency pins

requirements.txt

@@ -1,9 +1,8 @@
-accelerate>=1.0
-bitsandbytes>=0.43
-huggingface_hub>=0.24
-peft>=0.13
-pillow>=10.0
+accelerate==1.13.0
+bitsandbytes==0.49.2
+huggingface_hub==1.17.0
+peft==0.18.1
+pillow==12.2.0
 requests>=2.31
-safetensors>=0.4
-torch>=2.3
-transformers>=4.44
+safetensors==0.7.0
+transformers==5.9.0