[fujitatomoya]

Description

follow up of #3340

this enables the action that labels the backport status based on the abi compliance checker result.
this was the original goal of #2555 not to miss the backports to the downstream.

Fixes # (issue)

Is this user-facing behavior change?

Yes, but mostly for maintainers.
After this PR, action can automatically label the backport-xxx based on the abi compliance checker result.
Be advised that this is not decision, decision will be made by maintainers.
This is because, even if that is ABI compatible change, it sometimes generates the huge behavior change.
In that case, it is unlikely to backport the feature to the downstream distribution.

Did you use Generative AI?

Yes, Claude Fable 5.1

Additional Information

[github-actions]

ABI Compliance Check

✅ Verdict: compatible

Library	Verdict	Summary
libcomponent_manager.so	✅ compatible	No ABI changes detected.
librclcpp.so	✅ compatible	No ABI changes detected.
librclcpp_action.so	✅ compatible	No ABI changes detected.
librclcpp_lifecycle.so	✅ compatible	No ABI changes detected.

✅ libcomponent_manager.so — full abidiff report

Compared:

• Base: lib-base/libcomponent_manager.so
• Head: lib-pr/libcomponent_manager.so @ 30b27c1

(empty report — no differences printed by abidiff)

✅ librclcpp.so — full abidiff report

Compared:

• Base: lib-base/librclcpp.so
• Head: lib-pr/librclcpp.so @ 30b27c1

(empty report — no differences printed by abidiff)

✅ librclcpp_action.so — full abidiff report

Compared:

• Base: lib-base/librclcpp_action.so
• Head: lib-pr/librclcpp_action.so @ 30b27c1

(empty report — no differences printed by abidiff)

✅ librclcpp_lifecycle.so — full abidiff report

Compared:

• Base: lib-base/librclcpp_lifecycle.so
• Head: lib-pr/librclcpp_lifecycle.so @ 30b27c1

(empty report — no differences printed by abidiff)

_{Updated for commit 30b27c1 · check run · suppressions: /home/runner/work/_temp/ros2-abi-suppressions.txt}

[fujitatomoya]

@ahcorde can you review this?

[fujitatomoya]

@ahcorde this one is final PR to enable the auto-label backports, can you review this too?

after this PR is merged, i would like to create several test PRs to make sure that everything works fine. (and later on, i would like to enable this to other c/c++ projects.)