fix: 迁移顺序修复

internal/app/app.go

@@ -103,11 +103,11 @@ func (a *App) Start() error {
 
 			// 数据库迁移
 			if err := a.db.AutoMigrate(
-				&models.RequestLog{},
-				&models.GroupHourlyStat{},
-				&models.APIKey{},
 				&models.SystemSetting{},
 				&models.Group{},
+				&models.APIKey{},
+				&models.RequestLog{},
+				&models.GroupHourlyStat{},
 			); err != nil {
 				return fmt.Errorf("database auto-migration failed: %w", err)
 			}