FIX #25802 TIME 00:05 Add index creation for workflow main document in SQL file

sql/index_creation.sql

@@ -16,4 +16,7 @@ CREATE INDEX users_login_idx ON users (login);
 
 -- workflows
 CREATE INDEX workflows_id_idx ON workflows (id);
+CREATE INDEX workflows_main_document_id_idx ON workflows (main_document_id);
 CREATE INDEX workflows_user_id_idx ON workflows (user_id);
+
+