The periodic maintenance job `recover-mergeable-review` was silently merging
in-review tasks regardless of `autoMerge` and `mergeStrategy` settings,
defeating the PR-based review flow for users with `autoMerge: false` and
`mergeStrategy: "pull-request"`.
Gate the sweep on `settings.autoMerge` (and globalPause/enginePaused for
consistency with other merge entry points) and route through the engine's
merge queue via the existing `enqueueMerge` callback so `mergeStrategy ===
"pull-request"` is honored. Falls back to the direct `store.mergeTask` path
only when no enqueue callback is wired (standalone/tests).
Closes https://github.com/Runfusion/Fusion/issues/21
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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