add quotes for the fallback option when sql breakdown fails (#480)

* add quotes

* fix failed test

wren-ai-service/src/web/v1/services/ask_details.py

@@ -4,6 +4,7 @@ from typing import List, Literal, Optional
 from haystack import Pipeline
 from pydantic import BaseModel
 
+from src.core.engine import add_quotes
 from src.utils import async_timer
 
 logger = logging.getLogger("wren-ai-service")
@@ -93,7 +94,7 @@ class AskDetailsService:
             if not ask_details_result["steps"]:
                 ask_details_result["steps"] = [
                     {
-                        "sql": ask_details_request.sql,
+                        "sql": add_quotes(ask_details_request.sql),
                         "summary": ask_details_request.summary,
                         "cte_name": "",
                     }

wren-ai-service/tests/pytest/services/test_ask_details.py

@@ -70,7 +70,7 @@ def test_ask_details_with_successful_sql(ask_details_service: AskDetailsService)
 def test_ask_details_with_failed_sql(ask_details_service: AskDetailsService):
     # asking details
     query_id = str(uuid.uuid4())
-    sql = "SELECT * FROM xxx"
+    sql = 'SELECT * FROM "xxx"'
     summary = "This is a summary"
     ask_details_request = AskDetailsRequest(
         query="How many books are there?'",