GH-499: Require PR labels for changelog

[lidavidm]

• Validate that at least one of certain labels are present on a PR.
• Validate the format of the title.
• Add label for things that are not dependencies but are other chores (release/build work).
• Add label for documentation updates.
• Validate that a PR titled GH-499 is actually linked to issue #499 by poking the GitHub API.
• Add the GitHub config to use these labels for changelog generation.

Closes #499.

[jbonofre]

It looks good. Maybe we should also update the GitHub PR Template to "strongly" emphasize on issue ?

[lidavidm]

Will do.

It looks like you can't have selectors in pull request templates like you can in issues, but looks like we could add a set of checkboxes and have the action populate the labels based on that instead (or something similar)

[jbonofre]

Yes. It's what I have in mind.

[lidavidm]

Example run: https://github.com/lidavidm/arrow-java/actions/runs/13234776842/job/36937648586

[lidavidm]

I've updated this with an action that checks the title, linked issue, and labels.

Demo here: lidavidm#6

If missing a label it will make a comment, when the label is added it will hide the comment.

[kou]

+1

Let's try this!