P6.2-B: keep monitoring association stable and consume safe static report projection

[masarray]

P6.2-B field stability integration

This draft integrates ARIEC61850 PR #89 after physical SIPROTEC evidence showed two distinct regressions:

• one-member NamedVariableList probation succeeds, but subsequent automatic full dynamic DataSet activation can abort the production MMS association;
• static RCBs activate, but field-observed MX FCD payloads can arrive as structured two-process-value + q/t values and must be projected to exact IEC leaves before becoming process-authoritative.

Integration behavior

• pin the exact reviewed ARIEC PR Add fast and self-healing fault-record workflow #89 engine commit;
• automatic full dynamic DataSet activation is quarantined in the engine, so ARSAS receives static-report plans plus bounded MMS polling residual instead of scheduling a risky production dynamic mutation;
• P6.1 static-failure isolation remains unchanged: static activation failure does not trigger a dynamic write;
• field-observed MX structures project into explicit instMag.f / mag.f or instCVal.mag.f / cVal.mag.f leaves with decoded q/t;
• ambiguous structured report values remain fail-closed and MMS verification/fallback remains authoritative;
• no quality value is forced to Good.

Regression coverage

• exact engine provenance / PR history;
• field MX projection through the ARSAS consumer safety boundary;
• ambiguous Boolean structure cannot overwrite scalar process state;
• P6.1 static failure isolation remains intact.

Do not merge until ARIEC PR #89 and all ARSAS CI workflows are green. Physical SIPROTEC retest is still required before release.

[masarray]

P6.2-B CI evidence — ARSAS head 3844d45b141c401e524b4ea1c4c75e8b7b7014ab, pinned ARIEC head 249fb130e0e18e7a98e07e8894f24610bdb5642e / PR #89:

• Build ARSAS run #1293 (32211366441) — SUCCESS
  • immutable engine checkout — success
  • source/release invariants — success
  • restore/build — success
  • full ARSAS regression tests — success
  • portable publish + smoke test — success
• Validate Windows installer run #279 (32211366443) — SUCCESS
  • restore/build/test — success
  • installer compile — success
  • silent install/uninstall smoke — success
• Validate IO List Testing run #279 (32211366483) — SUCCESS
• Validate SV evidence bundles run #415 (32211366451) — SUCCESS

Keep draft/unmerged pending physical SIPROTEC retest. Acceptance focus: first healthy association must stay alive, static RCB must start without a preceding full dynamic mutation, supported MX report structures must project to the exact selected leaf with real q/t, and ambiguous report structures must remain MMS-authoritative rather than being guessed.

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