Update requirements.txt

requirements.txt

@@ -18,13 +18,13 @@ langchain-together==0.0.2
 # ==================
 # Embeddings & LLMs
 # ==================
-transformers==4.39.3             # HuggingFace models
-sentence-transformers==2.7.0     # Sentence embeddings
-accelerate==0.27.2               # Optimization
-faiss-cpu==1.7.4                 # Vector search
-einops==0.7.0                    # Tensor ops
-torch==2.1.2
-huggingface_hub==0.14.1
+transformers==4.39.3              # Must use huggingface_hub >=0.19.3
+sentence-transformers==2.7.0      # Compatible with transformers 4.39+
+huggingface_hub==0.21.4           # Works with both above
+torch==2.1.2                      # Required by sentence-transformers
+accelerate==0.27.2
+faiss-cpu==1.7.4
+einops==0.7.0
 
 # ===================
 # Firebase Integration