fix: previous migration

Author: mosoriob

migrations/1751384853171_add_dataset_id_subtask_v2/down.sql

@@ -0,0 +1,2 @@
+ALTER TABLE thread
+DROP COLUMN dataset_id;

migrations/1751384853171_add_dataset_id_subtask_v2/up.sql

@@ -0,0 +1,2 @@
+ALTER TABLE thread
+ADD COLUMN dataset_id text;