[masarray]

Combined immutable trial (not main/release)

• Base consumer: P0-R P0-R integration: preserve field-accepted Command Dock, compile model-bound Read authority, expose exact FC scope #652 at 9f3212253aa3cfe7e1629069272f1a8e6517bc71 (inherits accepted UI/ZIV/GoCB P109AB: persistent ctlModel gear in virtualized dock and vendor-neutral O(N) projection #650 and reconciled Browser/Report P0-H: fail-closed canonical Report alias collisions and sibling-phase fallback #645).
• Engine trial: P0-C fix: bind Signal Selection one-to-one to static DataSet members #184 at exact 9c7cb40364023a7b217e5ec31ab3105ba90142eb after successful engine Windows .NET CI run 39505819831, 1,182 tests passed. Original fix: recover offline static DataSet members in Signal Selection #183 c85d4e20db722bd0c2729f2533b323b13d3ef735 remains explicitly recorded as historical underlying engine control/report isolation trial and is not rewritten.
• Only engines/ARIEC61850.lock.json changed; this is not an unreviewed merge/rebase or alteration to Command Dock, SCL, Report, GoCB, control safety, native bridge, or UI.

Qualification objective

Run exact-head consumer Windows full regression, engine API verification, packaging, portable smoke and discovery/SCL promotion guards against the immutable engine #184 SHA. Confirm stage telemetry postResponseStage and configuredApplicationErrorGraceMs can be consumed with unchanged externally visible result handling, and delayed LastApplError still blocks Operate. No 400ms change, no automatic IED commands, no assumed improved latency.

No physical acceptance

Real SIEBCU XCBR1 SV/OR/BL scalar reads, SumSwARs.units.multiplier raw GVA, physical command latency, RCB continuity, multi-DPI WPF, and Inno installer still require dedicated FAT. Do NOT merge to main or publish stable from green CI alone.

[masarray]

D27 superseded historical stacked PR — source already in integrated RC #727.

Exact ancestry verification: historical head 069a32adfae69d9f59fab72aac5f9ba6709371ea → current RC d2d0ca731061824102058756fba8599ddfa2342e: ahead_by=755, behind_by=0. This proves the RC contains every commit on the historical branch; this PR does not need another merge. Closed as already absorbed into the RC ancestry, not as a direct GitHub PR merge. It does not establish live IED, physical FAT, trial-engine or mainline acceptance. #729 is the independent mainline promotion gate.