Add IDs for the maintainer attention labels

[dhruvkb]

Description

This PR fixes the issue where the lack of IDs for the maintainer labels caused the labelling script to fail. All labels must have a node ID to be applied via the GraphQL API.

The PR also improves the logging to show label names instead of the "[object Object]" that is otherwise printed on non-interactive consoles.

Checklist

• My pull request has a descriptive title (not a vague title likeUpdate index.md).
• My pull request targets the default branch of the repository (main) or a parent feature branch.
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible errors.
• I ran the DAG documentation generator (if applicable).

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[AetherUnbound]

LGTM

[sarayourfriend]

LGTM 🚀