0431 — The umbrella package is systemmanager, not Maintainer

Context. The top-level package that claims the system manager row and runs everything in the deployment needed a name; Maintainer was the incumbent candidate from the old machinery.

Decision. systemmanager, after researching how comparable systems name the umbrella process (kube-controller-manager, the autovacuum launcher, River’s QueueMaintainer): the umbrella is named for what it does to its children, and this codebase’s noun for that is manager.

Consequences. The daemon command is vulkan manager run, matching the package. Rejected: Maintainer — it named the old duty machinery, not the spawn-and-reconcile relationship the process actually has to its workers.