Update requirements.txt

requirements.txt

@@ -3,7 +3,32 @@ accelerate==0.21.0
 auto-gptq==0.3.0
 sentence-transformers==2.2.2
 faiss-cpu==1.7.3
-langchain==0.0.196
+langchain==0.0.196# Sentence Embeddings
+sentence-transformers==2.2.2
+
+# Required version due to deprecated `cached_download`
+huggingface-hub==0.16.4
+
+# Transformers for model loading
+transformers==4.39.3
+
+# Vector store
+faiss-cpu
+
+# LangChain for document Q&A
+langchain
+
+# UI
+gradio
+
+# Torch backend (adjust based on Space or local env)
+torch>=2.1.0
+# For PDF loading
+# pypdf
+
+# If using local file management
+# python-multipart
+
 langchain-community==0.0.17
 huggingface-hub==0.15.1
 torch==2.0.1