Update after the Bluesky crash: We decided to reset/refresh the cursor, because given the unstable situation on the Bluesky side we were unable to catch up with the backlog without a major architectural rebuild. We learned a lot, though, and will consider that rebuild for the near future.
What a day, huh? Relaunched the labeling service now, will first try to digest several (currently 8) hours of accumulated backlog, but unless we can catch up significantly within the next 2-3 hours we will reset the cursor to the current firehose head, prioritizing fresh posts.