basic llm request stream

backend/internal/adapter/database/turso/migrations/000001_create_tables.down.sql

@@ -9,6 +9,7 @@ drop table user_teams;
 drop table channels;
 drop table tools;
 drop table tasks;
-drop table history;
+drop table chats;
+drop table chat_contents;
 drop table files;
 drop table agents;