0e1f25384e
Confirmed on a real post: VK can still be transcoding lower renditions 8+ minutes after publish, so a few seconds of backoff wasn't enough margin. Size-exceeded failures now get their own retry budget (5 attempts, 90s apart - up to 7.5 extra minutes) instead of sharing the short 3s backoff meant for stalls/timeouts. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>