FAT v2 P4: import static DataSet FAT scope from SCL

[masarray]

Stacked on proven FAT v2 P3

Base branch: feat/fat-v2-source-bundle
Base SHA: cb785bb06d95f838e8bafad5e1978699bc56e117
P4 proven head: 76058fe20f69210fb033e306c2f54be497ba352b

P4 is intentionally limited to SCL -> FAT projection/import orchestration. It does not add another XML parser, does not change the ARIEC61850 pin, and does not implement the later generic FAT UX/report phase.

P4 contract

• production importer calls pinned ARIEC SclWorkspaceService.OpenAsync
• P3 source SHA-256 is cross-checked against the ARIEC workspace source SHA
• existing ARIEC static DataSet authority / FatDataSetSignalProjectionService remains the only membership source
• exactly one persisted FAT test point is created per static DataSet membership
• no ST/MX inclusion filter: digital, analog, and other types remain required rows
• classification is conservative: FC MX alone no longer implies analog; non-proven types use operator snapshot capture
• every imported row starts TestEnabled=true and ImportReady=true
• SCL without Communication/IP remains valid offline FAT scope; endpoint binding is a separate live-acquisition finding
• duplicate membership of one runtime object in multiple DataSets remains multiple distinct rows
• competing different SCL authorities for the same IED/AccessPoint are rejected instead of silently merged
• exact-content duplicate SCL files are not imported twice
• P3 source-bundle identity is attached to the generated IoTestProject; row provenance carries deterministic point ID, source ID, source filename, member index, DataSet and binding evidence
• no static DataSet means zero fabricated rows plus an explicit finding
• no UI launcher/dialog wiring or generic Value1/Value2 report work is included in P4

Regression coverage

• real-file production ARIEC loader with Siemens-like 58 static members: 58/58 persisted, 36 discrete + 22 analog, no Communication/IP and still FAT-ready
• duplicate DataSet membership produces two distinct persisted points
• MX INT32 remains Other / OperatorSnapshot rather than being misclassified analog
• multi-SCL input order does not change project/source identity
• multi-SCL project restores operator selection through P3 persistence and round-trips through .arsas with provenance intact
• SCL with no static DataSet yields zero rows and explicit finding

Focused-gate hardening

The IO List Testing workflow previously filtered only IoTest*|IoList*. P4 expands the focused test selection and path triggers to include IoFat*, FatDataSet*, and FatScl*, so source-bundle and SCL-import regressions are now guaranteed to run in the focused gate rather than relying only on the full application suite.

Scope audit

Compared with proven P3 head, this branch is 4 commits ahead and 0 behind. Exactly 4 files changed:

• .github/workflows/validate-io-testing.yml
• Services/IoTesting/FatDataSetSignalProjectionService.cs
• Services/IoTesting/IoFatSclProjectImportService.cs
• tests/ARSAS.Tests/IoFatSclProjectImportTests.cs

No ARIEC engine pin, SCL parser/engine authority, IEC 61850 protocol/control path, P2 rolling-capture implementation, P3 source persistence/package implementation, or FAT UI/report layout was changed.

ARIEC61850 remains pinned to 26c85400a4da230c4429e6302847f230385b6687.

Exact-head evidence

Exact P4 head 76058fe20f69210fb033e306c2f54be497ba352b:

• Validate IO List Testing #456 — SUCCESS
  • immutable ARIEC pin checkout — SUCCESS
  • focused compiler — SUCCESS, 0 errors
  • widened FAT filter (IoTest|IoList|IoFat|FatDataSet|FatScl) — active
  • 151 passed, 0 failed, 0 skipped
• Validate SV evidence bundles #625 — SUCCESS
  • focused compiler — SUCCESS
  • SV evidence regression suite — SUCCESS
• Build ARSAS #1513 — SUCCESS
  • source/license boundaries — SUCCESS
  • premium UX / GOOSE / SMV / SAS invariants — SUCCESS
  • immutable ARIEC API verification — SUCCESS
  • solution restore/build — SUCCESS
  • full ARSAS application regression suite — SUCCESS
  • portable single-EXE publish — SUCCESS
  • portable single-EXE smoke test — SUCCESS

The branch is intentionally left unmerged and this PR remains draft for stacked-phase review.

[masarray]

Closing as superseded by consolidated FAT PR #236. The SCL import/static DataSet scope from this stacked P4 branch is already contained in the active FAT branch ancestry; retain this PR only as historical evidence, not as a separate merge target.