fixed Sonarqube Code Issues

database/migrations/20260901_add_route_activated_at.sql

@@ -1,3 +1,4 @@
 -- Ergänzt den manuellen Freigabezeitpunkt für Strecken.
 -- Neue Strecken bleiben unveröffentlicht, solange activated_at is NULL.
-ALTER TABLE routes ADD COLUMN activated_at TEXT DEFAULT NULL;
+
+ALTER TABLE routes ADD COLUMN activated_at TEXT DEFAULT NULL;

database/schema.sql

@@ -27,7 +27,7 @@ CREATE TABLE IF NOT EXISTS routes (
 CREATE TRIGGER IF NOT EXISTS routes_updated_at
 AFTER UPDATE ON routes
 FOR EACH ROW
-WHEN NEW.updated_at = OLD.updated_at
+WHEN NEW.updated_at IS OLD.updated_at
 BEGIN
   UPDATE routes
   SET updated_at = CURRENT_TIMESTAMP