Enable Require merge queue on main-Branch ruleset

[dborgards]

Severity

High

Location

• .github/workflows/ci.yml (approx. lines 8–18) — already triggers merge_group
• Ruleset main-Branch (id 22609422)
• GitHub reports mergeQueue: null

Problem

Issue #106 was closed as completed with a decision to enable the merge queue; the settings half was left to the maintainer. The ruleset requires OS + format checks and merge commits, but does not require the merge queue. Two green PRs can still land minutes apart and break main (see #85).

Proposed fix

1. Enable Allow merge queues for the repo if needed.
2. On ruleset main-Branch, enable Require merge queue.
3. Set the queue merge method to merge commit (not squash — squash would change what semantic-release versions).

Decision question

None beyond confirming merge-commit (not squash) for the queue, as already preferred for this repo.

Review

From CanKit.Pro deep review of main @ 1cde1fc (2026-09-26).
Agent: https://cursor.com/agents/bc-39693a30-0a4f-5743-850f-1ab80aeb4dc5
Related: #106, #85

[dborgards]

Investigated. GitHub Merge Queue is not available for this repository/account plan. The workflow already supports merge_group, but the repository settings do not expose the Require merge queue rule. Keeping branch protection with required status checks and up-to-date branches instead.