Search: update prompt to enfore valid JSON in response

src/semantic_search/semantic_search/query.py

@@ -83,12 +83,13 @@ def smart_query(namespace, query, username: str):
               "Be as clear and short as possible and don't use any introductionary words. Omit phrases like, "
               "\"Based on the messages found.\" Exclude search queries and questions from the messages. Rely on "
               "positive statements.\n\n"
-              "The output should be a valid JSON object (don't include any surrounding text) with "
+              "The output MUST be a valid JSON object (don't include any surrounding text) with "
               "the following schema:\n"
               "{\n"
               "   \"messages_explain\": \"List out all message objects from the JSON above that relate to the query."
               "Describe how each message in this list relates to the query in detail. Use a separate field for that. "
-              "Exclude search queries and Haly/Haly Master mentions from this list. Rely on positive statements.\",\n"
+              "Exclude search queries and Haly/Haly Master mentions from this list. Rely on positive statements. "
+              "Make sure you include correct JSON objects.\",\n"
               "   \"explain\": \"Think through the messages in the messages_explain field above and infer the "
               "answer to the query. Use strong deduction and explain the conclusion. Be as concise as possible.\",\n"
               "   \"answer\": \"Based on the explain and messages_explain fields, generate a short and concise "