fix(ci): clean leftover draft nightly releases before recreating

[mo-auto]

Summary

The nightly Build and Publish leaves draft nightly releases lying around instead of a single pre-release, and they accumulate over time.

Cause: the SLSA provenance job (slsa-github-generator with upload-assets: true, upload-tag-name: nightly) creates a draft release on the nightly tag, and build-nightly-build's gh release delete nightly only removes the published release — the draft sharing the tag is left behind, so a new draft piles up each cycle.

Fix: before recreating the nightly pre-release, delete every release pointing at the nightly tag (drafts included) by id, then drop the tag as before.

Notes

• Standalone fix off main so it can merge ahead of the next scheduled nightly (sibling to fix(ci): publish agama-inbound jar so the auth-server image can build #14228).
• The existing accumulated draft was removed manually; this prevents recurrence.

Summary by CodeRabbit

• Chores
  • Improved the nightly build workflow's release artifact cleanup process for more reliable nightly build operations.

[mo-auto]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 79c34c33-663b-43ba-b9db-181ed04a3473

📥 Commits

Reviewing files that changed from the base of the PR and between feed511 and 8ddd2c0.

📒 Files selected for processing (1)

• .github/workflows/build-nightly-build.yml

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📝 Walkthrough

Walkthrough

The nightly build workflow is updated to explicitly delete all GitHub releases matching the nightly tag by querying the releases API, filtering for tag name "nightly", and deleting each matching release ID before proceeding with existing cleanup steps. Individual deletion errors are suppressed.

Changes

CI Nightly Release Cleanup

Layer / File(s)	Summary
Explicit nightly release deletion via gh api .github/workflows/build-nightly-build.yml	Workflow adds a bash loop that queries all repository releases, filters those matching the nightly tag, and deletes each release by ID while suppressing individual deletion errors before existing tag cleanup.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Suggested labels

kind-bug, area-CI

Suggested reviewers

• moabu

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	❓ Inconclusive	The description provides clear context (target issue, implementation details) but does not follow the required template structure with explicit sections and checklists.	Restructure the description to match the required template: add 'Target issue' section with issue reference, use 'Implementation Details' heading, and complete the test/documentation checklist.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: cleaning up leftover draft nightly releases before recreating the nightly release.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci/clean-nightly-draft-releases

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