Add needs-release-note label for PRs without release notes

[kelos-bot]

/kind feature

What type of PR is this?

Feature: Automatically sync release-note labels for PRs based on release note content.

What this PR does / why we need it:

Extends the Label workflow (.github/workflows/label.yaml) to automatically manage release-note labels on PRs based on the content of the release-note fenced block in their body. When the PR body is edited, labels are re-evaluated.

Changes:

• Added edited to pull_request_target event types so the workflow re-evaluates when a PR body is modified
• Added release-note block detection logic that parses the PR body for the ```release-note fenced block
• Adds release-note label when the block contains a non-empty, non-NONE release note
• Adds release-note-none label when the block explicitly contains "NONE" (case-insensitive)
• Adds needs-release-note label when the block is missing or empty
• Removes stale release-note labels when the PR body is edited

Which issue(s) this PR is related to:

Closes #530

Special notes for your reviewer:

The release-note check only applies to PRs (not issues), matching the same parsing approach used by hack/release-notes/main.go. The regex /\``release-note\s*\n([\s\S]*?)```/` matches the fenced block and checks content to determine which label to apply.

Does this PR introduce a user-facing change?

NONE

[cubic-dev-ai]

1 issue found across 1 file

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name=".github/workflows/label.yaml">

<violation number="1" location=".github/workflows/label.yaml:71">
P1: Release-note check is unreachable when any label-sync rule fails. The `throw` on the preceding line aborts the script before this code runs. Move the release-note block before the aggregated error throw (or into its own try/catch) so it always executes independently.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}

[gjkim42]

label "release-note" to the PR that has a release note.
and label "release-note-none" to the PR that explicitly set "none"(case insensitively) to the PR.

and needs-release-note should be set if either of it does not present
/reset-worker

[gjkim42]

lgtm
/squash-commits