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fix(signals): wake tracked effects when a value they read stale commits (#3291)

createTrackedEffect reads with committed visibility (#3006) but is woken by
writes, not commits. A signal written during the flush's render phase re-ran
the tracked effect in the same pass — before commitPendingNodes — so it read
the old value, and the commit never re-notified. Same gap for a first run
subscribing after the write's notification.

The tracked run now arms any dep still holding a staged value
(CONFIG_STAGED_UNSEEN); commitPendingNode re-enqueues tracked subscribers of
an armed node. commitPendingNode's two commit branches were deduplicated to
pay for it (minified core floor -6 B); size limits ratcheted for brotli drift.

Co-authored-by: Claude via Cursor <noreply@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

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