Fix field Event Log values, RCB export visibility, and nav clipping

[masarray]

Field evidence

AA1C1F13R4 field capture on ARSAS 1.6.31 showed three regressions:

1. Event Log could still show CDC structures or report metadata in place of scalar stVal/actVal values.
2. RCB Export disabled rows based on live availability/ownership and source-backed inventory could omit RCBs found only by live IED discovery.
3. Top workflow navigation was vertically clipped on the field Windows/DPI layout.

Fix

• Extend the ARSAS compatibility formatter for scalar stVal values and numeric indexed BCR/actVal structures, with narrow metadata guards.
• Make RCB availability/status informational rather than a checkbox/export lock: every discovered RCB remains selectable; non-available/conflicting evidence requires confirmation rather than hiding/locking the row.
• Preserve source/live DataSet mismatch as operator evidence and warning while keeping export available.
• Build RCB inventory as source SCL + unmatched live IED RCB union; live-discovered reports cannot be hidden by an older source model.
• Allow real RCBs with no DataSet to remain selectable/exportable; only require FCDA evidence when a DataSet is actually declared.
• Scope the navigation height/centering correction to MainWindow workflow buttons only.
• Add structured scalar formatter and RCB selection regressions.

Engine integration

ARIEC61850 PR #80 fixed DataRef/value alignment for DataRef-enabled IEC 61850 InformationReports and was merged after green CI. ARSAS is immutably pinned to engine main commit e23b295b87760be8f7f0ce978a6987027ea50523.

Verification

Final head 608843a1dbc93231f20377b3e697f4a3e7571f00 passed:

• Build ARSAS, including application regression tests and portable single-EXE smoke test
• Validate ARSAS Windows installer, including silent install/uninstall smoke test
• Legacy SAS RCB export guard
• Validate SV evidence bundles
• Validate IO List Testing

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