superseded: advertise bounded active-job polling cadence

[seonghobae]

Superseded by PR #130

This pull request is closed because it depended on superseded ancestry-diverged PR #124. PR #130 reconstructs the same bounded RFC 9110 polling-advisory behavior from replacement PR #129 exact head 587abb32811aee560459f7f9bbde1cad39cdc7b2 through connector-backed auditable commits.

This PR and its branch remain preserved as the original fail-first and review-driven hardening evidence, including the disabled-worker correction. The replacement does not force-push this branch, discard predecessor work, or use ours/theirs conflict heuristics.

Exact superseded head: 69a150977e1c7f7b5ee1194a670f622f09dfbeab.
Replacement PR: #130.

No check, review, or approval from this superseded exact head transfers to PR #130.

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[seonghobae]

Superseded by repaired stacked polling-cadence PR #130, which preserves the complete authority-separated scheduler, durable-worker and pagination lineage while carrying the worker-aware Retry-After contract. Keep this predecessor closed so one polling branch proceeds.