pull waits (bounded) for the swarm queue connection instead of failing at boot while the client is still connecting. The watch runs one pull after every attach, including re-attaches, and a failed attach or ended stream is retried with a bounded backoff instead of waiting for the next boot. A first deploy is not queued again while one for the agent is queued or running.
An agent whose first deploy was lost to a c0re restart is now deployed on the next boot, or the next watch re-attach, without anyone re-declaring it.
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