RPC-based (host-agnostic) lifecycle coverage for the manifest-driven immich stack
(immich + immich-postgres + immich-redis): presence + valid state of all 3 members,
a guard that no legacy underscore containers exist (catches botched migration /
legacy-installer fallback), destructive stop/start/restart of the server with
postgres+redis staying up, and cascade uninstall/reinstall (preserve_data).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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