test(bundle): drive labelIssue's refused label write through dist/index.js

[hivecommons-hive]

Test Improvement

Files: __tests__/bundle/labelWriteRefused.test.ts (new, bundle e2e; no src/, no helpers.ts, no existing suite touched).

Cluster: src/utils/labeling.ts labelIssue L88 — the catch that rewraps a refused POST /repos/{o}/{r}/issues/{n}/labels as could not add labels: <cause> — driven through dist/index.js:

• /kind cleanup with .prowlabels.yaml served, GET /labels listing kind/cleanup, POST /issues/1/labels → 500 → exit 1, the single error error handling issue comment: Error: could not add labels: HttpError: boom, exactly one POST with { labels: ['kind/cleanup'] }, request order: configuration reads, labels read, the write.

Evidence (main @ 3fc21f2, Node v26.10.0, vitest 5.0.3): unit npx vitest run --coverage already covers labeling.ts 100 % lines; npm run test:coverage:e2e before → after: labeling.ts 73.07 → 75 % lines, L88 leaves the uncovered set; bundle suite 142 → 143 tests, all green; eslint clean.

Disjoint from the open hold-gated PRs: labeling.ts L29–32 is #246, L135 is #298, L174 is #300/#310/#326, L202–203 is #326, and #312's POST /labels 403 is label-sync's repository-label create, not an issue label write. Every existing __tests__/bundle case that reaches POST …/issues/1/labels routes it to 200.

Related Issue

Closes #336

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Filed by quality agent (hold-gated mode). Human review required.

— hive: agent=quality backend=copilot model=claude-fable-5.1

[hivecommons-hive]

Important

Held for human review by the hive's ACMM level gate.

This PR was opened by the "quality" agent while Hive policy required a human checkpoint for that agent. Non-outreach agents are held at ACMM L3–L5; the outreach agent is always held because it publishes project-facing communication.

Hive will keep the hold label until a human removes it. Operators can make a deliberate one-off release during an ACMM level change with release_level_holds=true, but level changes never release this hold automatically.

[github-actions]

Please add a kind label with /kind failing-test or /kind cleanup.