Update requirements.txt

requirements.txt

@@ -1,9 +1,13 @@
-streamlit>=1.24.0
-langchain>=0.2.0
-langchain-community>=0.2.0
-faiss-cpu>=1.7.4
-PyPDF2>=3.0.1
-sentence-transformers>=2.6.0
-huggingface-hub>=0.23.0
-torch>=2.0.0
-numpy>=1.26.0
+streamlit==1.37.0
+langchain==0.2.16
+langchain-community==0.2.16
+faiss-cpu==1.8.0.post1
+PyPDF2==3.0.1
+pdfplumber==0.11.4
+sentence-transformers==3.0.1
+torch==2.4.0
+numpy==1.26.4
+transformers==4.44.2
+# Optional OCR (uncomment if needed)
+# pdf2image==1.17.0
+# pytesseract==0.3.13