Record the execution outcomes in the follow-up plan: FU-1 resolved as a documented
protocol limitation (gateway pending.md C4; not fixable without histsdk wire-capture
evidence), FU-2 done + live-validated (exact round-trip), FU-3 done (mux-ref vs
historian-name decoupled via HistorizedTagRef), FU-4 done. FU-5 (pre-existing Modbus
failure) and FU-6 (post-merge propagation) remain tracked.
Claude-Session: https://claude.ai/code/session_012SDSQ3AcaXqPcBtDESBRii