Update requirements.txt

requirements.txt

@@ -1,4 +1,16 @@
-gradio
-sentence-transformers
-transformers
-torch
+# Gradio UI
+gradio>=3.0
+
+# Dense embeddings
+sentence-transformers>=2.2.2
+torch>=1.12.0
+
+# Sparse BM25
+rank_bm25>=0.2.2
+
+# Late-interaction (ColBERT)
+transformers>=4.26.0
+colbert-py>=1.0.0         # or replace with your ColBERT package name/version
+
+# (Optional) HF hub support
+huggingface-hub>=0.13.0