Priority Queue

Why it matters: Lets urgent agent work preempt ordinary work while retaining predictable ordering for equal priority.

Durable leased queue ordered by priority and then FIFO sequence within each priority lane.

API endpoints

Method	Path	Description
POST	/v1/priority-queues	Create a priority queue
POST	/v1/priority-queues/:id/messages	Send a prioritized message
POST	/v1/priority-queues/:id/claim	Lease the highest-priority available messages
POST	/v1/priority-queues/:id/messages/:messageId/ack	Acknowledge a message