M2.14 SG: show model-verified active setting values in parameter rows

[masarray]

M2.14 — fix real SG parameter values, not a cosmetic placeholder

Stack #560 → #563 (Thread A) → #567 (A/B validated) → #568 (read-only SGCB/GoCB validated) → this PR. Owns Browser presentation and explicit SG read plan only.

Root cause

The SGCB detail pane grouped all SG + SE leaves into a synthetic DO root and set its ValueReference only for a single-attribute DO. On a real relay with multiple SG/SE attribute declarations this results in an unbound Not read root even when exact SG leaf observations exist. It also reads SE edit-group fields unnecessarily when choosing active SG inspection.

Fix

• Project exact active FC=SG parameter branches directly via the existing lazy, schema-constrained AttributeRows projector, e.g. ATCC1.BndWid.setMag [SG] linked to ...$SG$BndWid$setMag$f, and f [SG] on expansion.
• Preserve canonical source/FC, unit provenance, lazy descendants, and association fences; do not infer active group from SE, change group, reserve, or write.
• Prefer unique verified primitive f if both a structured parent and its primitive are in the declaration.
• Explicit selected SGCB Read targets active SG plus inventory-proven read-only SGCB status; no SE edit-group sweep. Global Read All semantics are unchanged.
• Four negative/positive regression tests and updated presentation baseline; no engine pin, Report/GI/cyclic MMS, SSOT, or stable branch changes.

Acceptance

Require exact-SHA Windows compile, full ARSAS regression, pinned engine/native CTest, artifact verification. A screenshot from a physically connected ZIV AVR is still required to prove what SG attributes the device actually permits read-only access to. Other CF unit issues will be handled under Thread A's authority rather than a competing unit decoder.