P2: primary secondary measurement context workflow

[masarray]

Scope

This phase turns the P1 primary/secondary conversion API into a user-facing, repeatable engineering workflow.

Implemented

• CT/VT measurement-context editor for the selected logical SV stream
• explicit wire-domain and preferred display-domain selection
• independent current and voltage ratios with evidence source and reference
• primary/secondary conversion applied to decoded values, waveform, RMS, and phasors
• conservative per-domain fallback when a ratio is absent
• context persistence across live UI refreshes and stream rediscovery in the same session
• versioned measurement-context JSON import/export
• schema validation, duplicate-key rejection, unit validation, and enum-safe serialization
• responsive toolbar actions added without changing selected-stream behavior
• deterministic serializer and ratio-resolution tests
• engineering workflow documentation

Validation at head 549a7b2

• CI: passed
• Publisher warnings-as-errors build: passed
• Subscriber warnings-as-errors build: passed
• test and coverage gates: passed
• dependency vulnerability checks: passed
• Windows portable and installer build: passed
• installer silent smoke test: passed
• SBOM and checksum generation: passed
• GitHub Pages validation: passed
• CodeQL: passed

Safety boundary

Context changes presentation only. Raw bytes and protocol-scaled wire values remain preserved. No ratio is inferred from vendor identity, APPID, MAC address, amplitude, or naming.

Pending after this tranche

• embed measurement context directly into the Subscriber evidence bundle schema
• automatic ratio extraction from reviewed SCL/device setting sources
• local Npcap/kernel/queue drop attribution
• versioned declarative SV profile manifests
• fixture-backed IEC 61869-9 profiles
• SMU615 device-observed validation pack

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Move CT/VT conversion into the shared engine

This reimplements the primary/secondary conversion in the WPF view model instead of consuming an engine contract. Decoded rows use SvMeasurementDomainResolver, while waveform and phasor conversion use this separate multiplier; any correction to conversion semantics or validation can therefore make the grid disagree with the plots/RMS output. Centralize this conversion in ARSVIN.Engine and have all Subscriber presentations consume the same typed result.

AGENTS.md reference: AGENTS.md:L14-L16

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[chatgpt-codex-connector]

Reject null stream arrays during JSON import

A syntactically valid import such as {"streams":null} deserializes with Streams set to null, then this dereference throws NullReferenceException. FromJson only converts JsonException to InvalidDataException, and the UI import handler catches only IO, authorization, and invalid-data exceptions, so importing this malformed-but-valid JSON can escape the handler rather than show the intended validation error.

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