[loveRhythm1990]

What type of PR is this?

• build / ci (build or CI changes)

What this PR does / why we need it

Behavior change: this proposal restores valid configuration, but does not restore automatic enqueueing with the currently reported product settings. Maintainers would use @mergifyio queue. The enqueueing policy needs a maintainer decision before merge.

Remove rejected queue_rules[].autoqueue and migrate commit_message_template to commit_message_format. Keep one approval, no do-not-merge, and base=main as queue-level conditions. Squash merging, timeout, concurrency, and GitHub branch protection remain unchanged. Approver attribution becomes standard Approved-by trailers.

Related: #285; configuration failures on #347, #348, and #350.

Enqueueing decision

• Automatic: enable Merge Protections in the dashboard, then explicitly configure a conditional list (not unconditional true):

  merge_protections_settings:
    auto_merge_conditions:
      - "#approved-reviews-by>=1"
      - label!=do-not-merge
      - base=main

  This is an alternative, not included in the patch. Once autoqueue is removed, do not rely on the bot to migrate that field automatically.

• Manual: accept this proposal and use @mergifyio queue for eligible PRs.

The live configuration check confirms Workflow Automation is disabled, so the retained pull_request_rules are inactive; this is now documented inline. The Merge Protections prerequisite comes from the bot's #285 notice; dashboard settings have not been independently verified or changed.

Validation

• Official schema validation, parsed-YAML gate checks, and git diff --check passed.
• Live Configuration changed passed on 999ccb4; the latest commit only adds comments and parses identically. Latest-head CI is pending.
• No tracked references to the old approver-attribution syntax outside .mergify.yml were found.
• Mergify Merge Queue still evaluates main's old configuration until merge, so its autoqueue error is separate from proposed-file validation.

Only .mergify.yml changes. No merge or product-setting changes performed.

[loveRhythm1990]

lgtm