Retrieve top 3 similar docs from Relevant paras to extract answer

src/langchain_utils.py

@@ -213,7 +213,7 @@ class LANGCHAIN_UTILS:
             )
 
         # Search for the similar docs
-        docs = docsearch.similarity_search(question, k=1)
+        docs = docsearch.similarity_search(question, k=3)
 
         llm = OpenAI(temperature=0)
         # Create a Chain for question answering
@@ -947,7 +947,7 @@ class LANGCHAIN_UTILS:
             'question': question,
             'answer': answer,
             'feedback': feedback,
-            'timestamp': datetime.strftime(datetime.now(), '%Y-%m-%d %H:%M:%S')
+            'timestamp': datetime.strftime(datetime.now(), '%Y-%m-%d %H:%M:%S.%f')[:-3]
         }
 
         # Save df into TSV format