Changel LLM model gemini-2.0-flash -> gemini-2.5-flash-lite

routes/sql_explorer.py

@@ -80,7 +80,7 @@ def _delete_saved_query(query_id):
 
 def _generate_sql_from_natural_language(natural_query):
     """Generates SQL query from natural language using Gemini REST API."""
-    gemni_model = os.environ.get("GEMINI_MODEL","gemini-2.0-flash")
+    gemni_model = os.environ.get("GEMINI_MODEL","gemini-2.5-flash-lite")
     api_key = os.environ.get("GEMINI_API_KEY")
     if not api_key:
         return None, "GEMINI_API_KEY environment variable not set."