A picture group's 500k articles made batches over the server's 256 MB body limit: HTTP 413, the range given back and leased again in a loop (148597: 39 times in 30 minutes). The worker now also posts once 100,000 completed or edge-cut files wait (RangeIndexer.pending). A stats refresh that failed kept the previous totals silently; it logs the error now. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>