Add warn log when deleting inactive users (go-gitea#32318)

Add log for the problem go-gitea#31480

Author: lunny

services/user/user.go

@@ -289,6 +289,7 @@ func DeleteInactiveUsers(ctx context.Context, olderThan time.Duration) error {
 		if err = DeleteUser(ctx, u, false); err != nil {
 			// Ignore inactive users that were ever active but then were set inactive by admin
 			if models.IsErrUserOwnRepos(err) || models.IsErrUserHasOrgs(err) || models.IsErrUserOwnPackages(err) {
+				log.Warn("Inactive user %q has repositories, organizations or packages, skipping deletion: %v", u.Name, err)
 				continue
 			}
 			select {