Reference checks for repeated elements in the `for` directive do not work correctly

[nakamura-to]

Description

At first glance, references to repeated elements in the for directive seem to work fine.

However, changing the element name does not cause an error.

Environment

• Doma Tools version: 0.3.0
• IntelliJ IDEA version: IntelliJ IDEA 2024.3.1.1 (Ultimate Edition)