[DOCS] Fix bundle release lifecycle and release dates

[lcawl]

Summary

Relates to elastic/docs-builder#3725, elastic/docs-builder#3700

This PR:

• updates the existing Kibana Serverless release bundles to have lifecycle: ga instead of preview
• adds missing release dates in the earliest bundles
• removes the discontinued bundle.resolve from the changelog configuration file
• adds bundle.branch to the changelog configuration file

Checklist

Check the PR satisfies following conditions.

Reviewers should verify this PR satisfies this list as well.

- [ ] Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
- [ ] Documentation was added for features that require explanation or tutorials
- [ ] Unit or functional tests were updated or added to match the most common scenarios
- [ ] If a plugin configuration key changed, check if it needs to be allowlisted in the cloud and added to the docker list
- [ ] This was checked for breaking HTTP API changes, and any breaking changes have been approved by the breaking-change committee. The release_note:breaking label should be applied in these situations.
- [ ] Flaky Test Runner was used on any tests changed
- [ ] The PR description includes the appropriate Release Notes section, and the correct release_note:* label is applied per the guidelines

• Review the backport guidelines and apply applicable backport:* labels.

Identify risks

N/A

[infra-vault-gh-plugin-prod]

Pinging @elastic/experience-docs (Team:Docs)

[github-actions]

🔍 Preview links for changed docs

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[github-actions]

✅ Elastic Docs Style Checker (Vale)

No issues found on modified lines!

---

The Vale linter checks documentation changes against the Elastic Docs style guide. To use Vale locally or report issues, refer to Elastic style guide for Vale.

[github-actions]

One typo in a release date; the rest of the bundle lifecycle and date updates look consistent.

Generated by Claude Reviewer for #280898 · 7.92 AIC · ⌖ 0.98 AIC

[github-actions]

The release date has a stray trailing w, so this bundle records an invalid date (2026-06-16w) unlike every other file in this PR. This will render an incorrect release date or break date parsing in docs-builder.

Suggested change

	release-date: 2026-06-16w
	release-date: 2026-06-16

[kibanamachine]

💚 Build Succeeded

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