`TriggerDeploy` had no producer — a node kind nothing enqueues is dead
code, and a publisher with no caller proves as little as a check nobody
runs.
It goes last in the creation chain, after `InitAgentConfigRepo` rather
than merely after the repo exists: the hive deploys by reading that
repo, so a deploy asked for any earlier would find nothing to build.
That edge is what makes creating an agent at swarm level actually put it
on a hive instead of leaving a provisioned name nobody runs.
The `hive` it carries is the string this handler already parsed as an
`Ident` and matched against the roster, so the node cannot name a hive
this swarm does not have.
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