added debugging code

main.py

@@ -19,6 +19,9 @@ def main():
     
     if not os.path.exists("./default.sqlite"):
 
+        file_ls_str = ", ".join(os.listdir("./raw_documents"))
+        print(f"File list: {file_ls_str}")
+        print("")
         documents = SimpleDirectoryReader(
             input_files=["./raw_documents/HI_Knowledge_Base.pdf"]
         ).load_data()