Real server contention observations
Base: 4121b30f78cd68c8aa033c949075ffcd9832be97
External BEGIN IMMEDIATE held 60 seconds after second provider-turn.start claimed.
[10:32:47.269] ERROR (#5750): Failed to requeue effect after unexpected worker failure
After release, read-only outbox query:
provider-turn.start|succeeded|1
provider-turn.start|running|1
Head: 2b686809eb7988292fd4a250ed67e503e69a7ef8
Same lock fixture and duration. After release, outbox query:
provider-turn.start|succeeded|1
provider-turn.start|succeeded|2