Captures the v3.3.82 near-miss the advisor caught: persisting _completedUploadKeys
risked silently no-op'ing a re-upload IF any retry path rebuilt jobs via
buildQueuePreview. Both retry paths (retrySelectedJobs, _retryFailedFromBuckets)
mutate jobs in place and are immune; only fresh modal re-adds go through the
preview and clear the key. Rule: read every 'erneut/retry/reupload' handler
before touching a skip-guard, decide mutate-vs-rebuild per handler.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>