chore: release v1.20.2-beta.1

[kgskr]

Summary

• Prepares beta release v1.20.2-beta.1 for the 1.20.2 stable train.
• Updates release-managed version files only; release-please remains the stable release owner.
• Merging this PR will publish v1.20.2-beta.1 only after the release-candidate validation checklist below is completed for this exact candidate SHA.
• Synced automatically from release-please PR chore(main): release 1.20.2 #40; no manual beta workflow dispatch is required.

Changes since v1.20.1

• fix(proxy): forward route kwargs through core_stream_responses adapter (fix(proxy): forward route kwargs through core_stream_responses adapter #39) (e454ef5)

Release-candidate validation

Validated candidate: 3117852

Complete these checks on the exact candidate SHA above before merging. The beta release guard and publish workflow fail while any item remains unchecked or the SHA is stale.

• Backend/unit/integration gates
• Frontend tests/build
• Wheel/package validation
• Docker/container smoke
• Live upstream/account smoke
• Live upstream/account smoke not required

Install after publish

uvx --from "codex-lb==1.20.2b1" codex-lb
docker pull ghcr.io/CINEV/codex-lb-cinamon:1.20.2-beta.1
helm install codex-lb oci://ghcr.io/cinev/charts/codex-lb --version 1.20.2-beta.1 --devel

Promotion

Merge the normal release-please PR to promote this beta-tested train to 1.20.2.

[github-actions]

This pull request has been automatically marked as stale because it has had no activity for 7 days.

It will be closed in 23 more days unless there is new activity.

If this is still relevant, please:

• Rebase or push an update if the branch drifted
• Address pending review feedback if there is any
• Leave a short comment confirming it is still being worked on

Thanks for the contribution 🙏