Create docs/drivers/TestConnectProbes.md: full reference for the Phase 5
protocol-handshake probes — result contract, per-driver handshake table,
TwinCAT/FOCAS/Galaxy degrade semantics, live-verify scope, and the
Historian.Wonderware already-done note. Annotate the Phase 7 step in
docs/plans/2026-05-28-adminui-driver-pages-design.md with a shipped note
pointing at the phase-5 design doc and TestConnectProbes.md.
Joseph Doherty