Lead decision 59. task_current picks each task's current snapshot,
skipping a poll row whose read_at is at or before the latest self row's
at; tasks_open reads it. Prototype on Node 24 and 26, two mutants
caught, and Dewey's fixture replayed: tasks_open now differs from v3a
only on #42 (in-progress). The notes add an S3 poller rule: compare a
read against task_current, not the raw latest row.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
jason.woltjeandClaude Opus 5.5
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