Update requirements.txt

requirements.txt

@@ -1,11 +1,12 @@
-flask==3.0.3
-flask-cors==4.0.1
-filelock==3.15.4
-chromadb==0.5.5
-fastembed==0.3.3
-sentence-transformers==3.0.1
-pypdf==4.3.1
-pymupdf==1.24.9
-huggingface_hub==0.24.6
-openai==1.43.0
-requests==2.31.0
+flask
+flask-cors
+filelock
+pypdf
+chromadb
+sentence-transformers
+fastembed
+huggingface_hub>=0.23
+
+# LLM providers (install all; choose at runtime with LLM_PROVIDER)
+openai>=1.40
+together>=1.2.0