Both driven from the Mac over the winrm CLI (WinRM 5985 + SMB 445, no helper
on the boxes). Migration 53->55; the first Central boot encrypts
DataConnections.PrimaryConfiguration (dp:protocol:v1:), so rollback is the
COPY_ONLY DB restore, not a binary swap. QA: all four nodes stopped together,
one shared-DB migration, 2 min 35 s window, preflight against a restored clone.
Claude-Session: https://claude.ai/code/session_01RgthVLVU5CJ8SUuEwruTkt
Joseph Doherty